The bug you described I only saw once and I still don't know how it occurs lol.
I had planned saving system, and cave generator, but this is my 2nd ever gamejam (btw the first one wasn't really a succes) and while I was learning new things I run out of time, so I hope you understand. If I decide to continue working on this project I will definetly add these.
Thank you so much for feedback!