BETA — this collection is still being built. Games appear, change and occasionally break.
games.stroetenga.nl
48 games that run straight in the browser — no install, no account, no plugins — and all 48 share the same small engine.
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Endless runner
Hold to fly, not jump. Coin trails, zappers that telegraph before they bite, and missiles that warn you from the edge of the screen before they commit. Sheep run alongside you — harmless until you land on one and ride it.
Art: assignment pack · Zoe Ruijten · Kenney.nl · GameArt2D
Match-3, three ways
Swap two neighbours to line up three, and let the cascades multiply. Choose how you want it: Zen never ends and reshuffles a dead board, Classic climbs levels and a seventh gem arrives to make them stick, Timed gives you thirty seconds and sells you more for every match.
Art: Kenney.nl Puzzle Pack II, CC0
Bubble shooter
Aim, fire, land three of a colour to pop them — and anything left hanging with nothing above it falls, which is where the points really are. A new row arrives every six shots. Let the stack reach the line and the run ends.
Art: Kenney.nl Puzzle Pack II, CC0, recoloured
Breakout
Bounce the ball, clear the bricks, do not let it past you. Where you hit the paddle decides where the ball goes — it is an aiming device, not a wall. Eight hand-drawn level shapes, and lettered capsules that fall out of broken bricks the way Popcorn did it — including the one that takes your power-ups away.
Art: Kenney.nl Puzzle Pack II, CC0
Pass the phone · 2–6 players
Drop a ball, drag to aim, hand the phone on. Balls never stop and never bounce — off one edge and back in the far side, still on the same line. The round ends the instant two of them touch, and whoever's ball did it loses. Fill the field with all twenty-four and nobody does.
No artwork — every pixel is drawn in canvas
Hold the line
Five rows of eleven, one cannon, four shields, and only one shot allowed in the air at a time. The swarm gets faster the more of it you kill — not because anything sets a speed, but because it steps one alien per tick, so fifty-five of them take fifty-five ticks to move and the last one takes one.
No artwork or audio files — sprites and sound both synthesised at boot
Block-fitting puzzle
Three pieces at a time, dropped anywhere they fit on an 8×8 board. Complete a row or a column and it clears — both at once, which is the one rule everybody implements wrong. No rotation, no gravity: the only decision is where.
Art: Kenney.nl Puzzle Pack II, CC0
Tower defence
Three towers, three levels each, twenty lives. Creeps walk a fixed road at a genuinely constant speed — which sounds obvious and is the thing most tower defences get wrong. Spreading your towers instead of bunching them is worth five times everything else put together.
No artwork — the map is drawn
Sixty seconds
Tap the moles, leave the bombs alone. It is a scheduler with a coat of paint: no hole ever pops twice running, none is ever starved, and no mole is ever shown for less time than a person can react to. The difficulty is how many are up at once.
No artwork — every pixel is drawn
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Arcade racer
Flat out down a coast road, with checkpoints that hand back time. There is no 3D anywhere in it: the road is a stack of horizontal slices and a single divide, curves are an offset accumulated twice, and hills hide what is behind them because of one comparison.
No artwork — the road is drawn
Maze chase
Eat every dot while four things hunt you. They all run the same two lines of code — take the exit that gets closest to your target, never turn round — and behave like four different animals, because each answers “which tile am I aiming at?” differently.
No artwork — every pixel is drawn
Push puzzle
Push the crates onto the marks. You can never pull, so undo is a main button. The test suite solves every level with a search — proving it is winnable and computing its par — so an unsolvable level cannot be shipped. One already tried.
No artwork — the warehouse is drawn
Minesweeping
Minesweeping with one promise: you will never have to guess. Two boards in five laid at random need luck somewhere, so the generator plays every board through a logical solver and throws it away if the solver has to guess. The HUD tells you how many it discarded.
No artwork — the field is drawn
Falling blocks
Stack them, clear rows, watch the floor come up. The part that matters is rotation against a wall: a short ordered list of nudges, tried in turn, is what lets a piece be screwed into a slot it could never simply drop into.
No artwork — every pixel is drawn
Lunar lander
Land it under two metres a second, upright, on a pad. The physics carries the half-a-t-squared term, so what counts as a safe landing does not quietly change with your frame rate — free fall is exact from 15 Hz to 1000.
No artwork — the moon is drawn
Vertical shooter
Fly, shoot, bank the bounties, buy a bigger gun, fly again. Every bullet pattern is fired nine hundred times in a test and asked the same question: was there anywhere the player could have gone? A pattern that covers every reachable square is not hard, it is broken.
No artwork — every pixel is drawn
Castle raid
Find the keys, free the prisoners, get out, and mind the guards — they see down corridors, not through walls. Every floor plan is proved finishable before it ships, which caught two of the three as impossible when they were first drawn.
No artwork — the castle is drawn
Putting
Six holes. Pull back from the ball and let go. Four thousand shots at full power were fired at the walls to prove the ball can never escape, and nine hundred more to prove it always comes to rest rather than creeping forever.
No artwork — the course is drawn
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BMX
Pedal for speed and the ramps will throw you — if you are quick enough. Nothing says “this is a ramp”: the wheels leave the ground when the ground curves away faster than gravity can hold them, which is why the same lip launches you at speed and holds you at a crawl.
No artwork — the course is drawn
Vector shooter
A field with no edges. Everything wraps, so a rock at one side is a few pixels from the other — and the ship keeps whatever speed you gave it, because pointing somewhere is not the same as going there. Shoot a rock and it does not die, it divides.
Art: Kenney.nl Space Shooter Redux (CC0) · the vector renderer needs no files at all
Logic puzzle
Numbers down the side, numbers across the top, and one picture that satisfies both. Every puzzle is solvable by deduction alone — a generator that cannot prove it is never shipped.
Patience
Fifty-two cards, four free cells, nothing hidden. Every deal is seeded and every seed is checked winnable before it ships, so a lost game is always yours to have lost.
Grid classic
Eat, grow, and run out of room. The whole game is the tension between the space you have and the length you have earned.
Defend the line
Six cities, three batteries, and shells that take time to arrive. You are not aiming at what falls — you are aiming at where it will be.
Road and river
Five lanes of traffic one way, five lanes of river the other, and five bays to fill at the top. Every pattern is generated, then searched for a route and the route walked again to confirm it — if a crossing cannot be made without luck, the pattern does not ship.
No artwork — the field is drawn
Top-down circuit racer
Tiny cars, one screen, a closed circuit and four laps. The whole track is visible at once, so every mistake is one you can see coming — and no track ships that can be cut.
Matching pairs
Turn two cards, keep them if they match. The board is dealt so that no run is decided before it starts, and the score rewards remembering rather than luck.
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Word guessing · 5 languages
Guess the word a letter at a time, in Dutch, English, German, French or Spanish. Each language brings its own alphabet, so the accented letters are letters and not near-misses.
Word deduction
Five letters, six tries, five languages. Every guess tells you which letters are right and which are merely present — and the awkward half of that is what happens when a letter appears twice, which is why the rule is written out twice here, facing opposite ways.
No artwork — the board is drawn
Anagrams
The letters are all there, in the wrong order. Tap them into place before the clock runs out, in any of five languages — and every word you get buys eight more seconds.
No artwork — the tiles are drawn
Dig and run
Dig through the earth for diamonds and reach the exit before the clock does. A boulder only kills you if it was already falling — one resting on your head is furniture — and nothing in the cave ever moves more than one cell in a tick, which took two separate fixes and has three tests holding it there.
No artwork — the cave is drawn
Pipe laying
The ooze has already started. Lay pipe ahead of it, and every piece you put down is one you cannot take back once it is wet. The cross is two pipes sharing a square rather than a junction — it goes straight through, and it can be filled twice.
No artwork — the pipes are drawn
Serve the bar
Four bars, and everyone on all four of them is walking towards you. Slide a drink down to push them back, then be standing there to catch the empty on its way home. Nothing asks where things are — it asks where they went, so a drink never passes through a customer however fast it is going.
No artwork — the bar is drawn
Dice and boxes
Five dice, three rolls, thirteen boxes and no way to leave one empty. Three of a kind scores all five dice, a straight survives a repeated pip, and every one of the 252 possible hands is checked against a second scorer written the slow way.
No artwork — everything is drawn
Deduction
Four pegs from six colours. Black for the right colour in the right place, white for the right colour in the wrong one — and counting the whites is the whole difficulty, because the answer can only supply what it has. All 1,679,616 pairs of codes are checked.
No artwork — everything is drawn
Pool
Eight-ball pool on a table that knows the difference between a cushion and a pocket. Momentum and energy are conserved to fourteen decimal places, and no ball ever passes through another however hard you hit it.
No artwork — everything is drawn
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Flick football
Flick your counter into the ball and put it past the keeper. One impulse, then friction and the rebounds decide — and the same flick gives bit-identical results at 30, 60, 120 and 240 frames a second.
No artwork — everything is drawn
One-button flyer
One button, one bird, and a gap that never quite lines up. Every course is built so the next gap is inside the bird's reach — picking them at random makes nearly one pipe in two unflyable, which is a death the player never earned.
No artwork — everything is drawn
Stacking
A block swings past; drop it. Whatever hangs over the edge is sliced off and the next one only gets what is left. Fifty perfect drops preserve the width exactly — not nearly, exactly — which is the bug that makes these games quietly shrink.
No artwork — everything is drawn
Sliding merge
Slide the board, matching numbers join, a new tile arrives. A row of 4 4 8 becomes 8 8, never 16, and the pair nearest the way you slid is the one that merges. All 625 possible rows are checked against a second implementation.
No artwork — everything is drawn
Cue sports
Billiards with no pockets at all. Three balls, one cue, and a point only for striking both of the others in a single shot.
Cue sports
Fifteen reds and six colours, in the order the game insists on. A long table, a thin pot, and a penalty for every ball you were not aiming at.
Flick basketball
Sixty seconds, six marks, and a hoop that only starts moving once you have proved the still ones. Draw back, let go, and gravity has the rest — the same flick gives the same shot at thirty frames a second and at two hundred and forty, because the arc is worked out rather than added up. A shot released before the buzzer still counts.
No artwork — everything is drawn
Drop-merge puzzle
Pick a column and let the block go. Equal blocks that end up touching join into one worth double, and that one can join something too — so a single drop can pay several times over. The next block is always on show, which is the whole point: you are choosing a column for two.
Dutch shuffleboard
Thirty discs, three rounds, four gates. Drag a disc across for a lane, pull back and let go; one disc in every compartment scores twenty. Three thousand slides were fired at the rails to prove a disc always stops and never leaves the board.
No artwork — the board is drawn
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Timing
One rope, then faster, then two - and then two close together. Tap to jump as the rope comes round; a hop that peaks right over it is PERFECT and counts twice. When the pair swings in, tap twice to jump high and clear both. Every change is called a beat before it lands.
No artwork — the figure is drawn
Dutch shuffleboard, from behind
The same board, seen from where you stand. Pull back and the discs slide away from you up the plank, through the gates into the compartments.
No artwork — the board is drawn in perspective
Timing
Bounce higher and higher. Hold to press the mat down, let go at the bottom for the big push, and never lean on the way up. Swipe in the air for saltos and twists, tap for the splits, and land them before the mat does. A ten-bounce routine, sixty seconds where every bounce counts, or free play to train.
No artwork — the figure and the mat are drawn
engine.js is the same file in all 48 — not similar, byte-for-byte
identical, which is checked with md5sum rather than claimed. It handles the fixed-timestep loop, the
entity list, layered drawing and input, and it knows nothing about running, matching,
shooting, bouncing, wrapping, marching, stacking, chasing, driving, putting, landing or
pedalling — which is the only reason eighteen more games could pick it up.
Each puzzle game keeps its rules in a file that touches no pixels at all —
board.js, hexgrid.js, bricks.js,
torus.js, invaders.js, blocks.js, td.js,
moles.js, road.js, maze.js, sokoban.js
— so the awkward part of each is unit tested rather than eyeballed: are there any
legal moves left, what does a ball moving faster than a brick is thick actually
hit, how far apart are two balls on a field with no edges, how fast does a
swarm move when nothing tells it a speed, do a row and a column clear together,
does a creep cover the same ground on a short leg as a long one, and
can this level be solved at all, can this board be cleared without guessing,
can this piece turn against a wall, could the player have dodged that, and
can the ball ever escape the course. 3,659 assertions across 50
suites. Most were wrong at first, and every one of those was caught here rather than
by a player — including two castle floor plans that could not be finished, a Sokoban
level with no solution, and a bullet pattern with no way out.
The student Nanonauts builds these grew out of are archived separately, at proto.stroetenga.nl/Nanonauts. That link is absolute on purpose: this page is served from two different sites, and a relative one only resolves on the one it was written for.