Yeah, the gameplay gets boring after a bit and the game definitely needs graphics for the enemies and player-character. I only realized the ability to collect tokens infinitely at the end and tried to fix it but couldn't, and since it wasn't a super-horrible bug I just decided to work on different, more important things like the third cave and some art. The out of bounds I was aware of the whole time but didn't really care too much about. Thanks for the feedback.
I will definitely update after the voting, I'll probably start working on much more graphics and some bugfixes tomorrow because I want a break.