What a cute mining adventure! The Downwell influence is unmistakable, and the rush of zipping past enemies and jumping on heads from that game is definitely here. With a dual purpose attack and digging mechanic the level design is much more dense, and you'll be tiptoeing around bombs and taking your time moreso than falling like a rock. The pickaxe is short range but you can mash pretty wildly to tear it up. The controls are tight and responsive, I always felt that the pickaxe swung where I wanted it to go.
The aesthetics are excellent. I love the cute design of the player and enemies, and the music is fun. I felt around stage 10-15 as if the levels weren't getting any more challenging, I'm not sure if some stage layout elements or probabilites changed level to level. The caves are packed fairly tight with all the rocks, bombs, and enemies, so maybe something sweeping down from the top of the stage to force you to speed up would have helped add to the challenge.