I can confirm I get the same issue with this game. Game is sideloaded fine, go to install on the playdate itself, bar gets to 100%, then gives me an error, just saying there was an error installing the game. Only other game I've had this issue with was Grelb's Very Good Poker: https://stevenf.itch.io/grelbs-very-good-video-poker He fixed it by separating the pdx from the source code, I think.