Asteroids in Python

Score

Lives

Wave

Best

⌨️ Controls

← → turn the ship • ↑ fire the engine
SPACE shoot — up to four shots at once
Tapping the field shoots too
P pause • R new game
🎮 Xbox controller? Just plug it in or pair it — the stick and D-pad are the arrow keys, A is SPACE, Menu pauses and View starts again

🎯 How to play

Turning points the ship. Thrust pushes it — and it keeps going.
To stop, turn all the way round and thrust against your own drift.
Fly off any edge and you come back on the other side.
The dashed ring means you cannot be hit for a moment. Use it to get clear.

🏆 Scoring

Big rock 20 • medium 50 • small 100.
Every rock you break makes two smaller, faster ones.
Clearing a whole wave is another 100.
Tip: break the big ones one at a time. Break them all at once and there will be sixteen little rocks after you.

🧑‍💻 This whole game is Python

There is almost no JavaScript on this page. The browser downloaded Pyodide — a complete Python interpreter compiled to WebAssembly — and then ran the .py files in funtime/pylib/. Python does the rules, the maths and the drawing.

File	What it does	Good functions to try re-writing
pylib/asteroids_rules.py	The rules: angles, drifting, wrapping, breaking	`point_from`, `wrap_position`, `thrust_ship`, `hit_rocks`
pylib/asteroids_draw.py	Painting space — Python calling the canvas	`draw_ship`, `draw_rock`, `render_game`
pylib/asteroids_web.py	The glue: the held keys, the taps, the loop	`do_action`, `on_key_down`, `frame`

🔍 Compare the two versions. Open lib/asteroids-rules.js and pylib/asteroids_rules.py side by side — same ideas, two languages.

🛠️ Build it yourself: Build Asteroids in Python walks you through the functions one at a time.

⚠️ If the game never starts: the page has to read its .py files, which a browser will not do for a page opened straight off your disk. Use the live site, or run python3 -m http.server in the project folder.