This is your first jam? Made everything by yourself? It's really impressive for your first jam IMO. I love the animation when going down to the next floor and the general idea of this game. I think if there were some indicators that would make you think about which next spot to dig in, this game has actual potential to become something really good. Currently you just aimlessly kinda walk around and dig. Give us an indicator where the next roughly hole should be, and then maybe work with stamina on each floor + traps in the ground, in further levels.
In any case, I think this is very good for your first jam!