The game looks good, and has potential, but for a game jam/prototype it's away too slow and grind. Mecha/drill dont seen to work or are just too underwhelming when compared to the cheap diggers, the same occour with the tnt and exchavator. The upgrades also dont seen to impact the game as much, even with max upgrades digging on lower deepths is really hard when compared to digging on early layers specially when you need 9000 ice for a drill upgrade and each clear only gives 96 ice, if lower layers rewarded more ice per block this would be fine.