Very satisfying to collect coins. Getting stuck on walls was annoying, probably make your character have a no friction, but rigidbodies also do that normally, I don't think I ever found out how to fix it. I wasn't a fan of a lot of the upgrades, I think it would've been better if you just simplified them heavily. No matter what the timer is still ticking down so you're not going to make the player too overpowered by just giving them straight upgrades. Good game.