itch.io

I get this same error on sim, but uploading to device works. My guess is the author used a different architecture to build than you're running on. Simulator has that limitation for games using C (like playbox2d) unless you do a song and dance to make a sort of "universal simulator binary".

Like Paul says, it’s either on Linux/x64 or on the Playdate itself for now, as I did use C for the physics. – Sorry about that.