games.stroetenga.nl
Twenty games that run straight in the browser — no install, no account, no plugins — and all twenty share the same small engine.
Advertisement
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
Endless match-3
Swap two neighbours to line up three. Cascades multiply, the board refills forever, and when no legal move is left anywhere it says so and deals the same gems out again — the way Bejeweled did, rather than ending the run.
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
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
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
engine.js is the same file in all twenty — 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. 1,145 assertions across twenty
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.