Super Mario Galaxy running in a browser tab. T4ctica1 built it on the Petari decompilation and the GalaxyQuest port, compiled to WebAssembly, with the game data streamed as you play.
The mouse is the Wii pointer for Star Bits, WASD runs and Space jumps; a gamepad works too, and phones get on-screen buttons and tilt steering. The first start downloads a lot, so give it a minute.
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