Penrose Islands

The theme of PROCJAM 2021 is "Change".

Which, in my case, means producing familiar kinds of output (procedurally generated islands) but changing up how it's done.

And that's to use Penrose tiling for the terrain (and water, and lava) rather than a regular grid.

The game's a bit rough-and-ready (mooch around looking for shinies and throw them into the volcano) but there's a "tourist" mode which lets you whizz around and admire the stunt programming. (Although if you really want to see what's going on under the hood, use "debug" mode to drop the landscape shading in favour of red/blue colouring the two types of underlying P3 rhombs.)

It's download-only -- the game uses rendering techniques which are not well supported by WebGL and threading which still has very limited WASM support.