Could you tell me the error your playdate is giving you ?
I also made a small fix since I think your crash might be due to a memory leak, could you redownload the game and tell me if it still crashes ?
I think the next update will be focused on more informations on what you buy, a statistics screen, some performance improvement since the game is currently running at 25 fps, diverse upgrades and maybe a soundtrack then MAYBE more animations :v
But I first have to finish another game I'm working on. Stay tuned !
I will keep those suggestion in the back of my head ! I initially intended to make some of the stuff you just suggested but since it was my first game on the Playdate I struggled a bit and didn't want to make a buggy/laggy mess (and even without all that the game sometimes run at 25fps...)
I'll probably come back to upgrading this game after some weeks/months of practicing !