Your pico8 is on fire! (Pico-1k)

Update: Huge thanks to sizescape for helping me to optimize this demo!
Advice to pick random positions instead of trying to walk through the whole screen was amazing.
Interestingly, following the changes, the number of compressed bytes stayed exactly the same.

Compressed bytes: 366
Non-interactive demo.
Readable source code is in the downloads.
Version 2:

Old version: