Hey, thanks for leaving a comment!
I can confirm the score uses an 8-bit vsriable, I hadn't used GB Studio before this jam so i wasn't entirely sure how to go about avoiding that. It's specified in the engine that global variables max out at 255, so I'd say the rollover is probable.
I also thought about adding some health indicator or lives meter, but to be honest I just ran out of time. Maybe after the jam I'll polish this more, maybe even make better spritework.
Thanks for the ideas!