You might want to make an update for the game. [After they updated "Playdate"] every time a fish lands on the ground it suddenly comes to a complete halt and crashes in the middle of the game. If you can fix it it would be great.
Viewing post in Fish'n Feathers for Playdate comments
This was a regression in OS update 1.12.1, a new patch should be coming out shortly that fixes the issue for this game (and others having the same crash).