An average entry with a good concept that need more time to be developed. 

I like the idea of a semi-random digging metroidvania, but there needs but be more block types, and also more interesting upgrades. Having better jumps fells pointless when you're able to dig stairs anyway.

I feel like going with a Spelunky/Terraria approach with this game would be the way to go.  Nice work.

i like the whole tactical digging metroidvania thing like exploring and discovering a bunch of crystals is satisfying like it tends to be in mining games

but this game is a bit confusing
the interface makes things a bit hard to understand
like it covers the number of crystals i have at the gem trade
i try to spend them but it does nothing except a sound effect
the choice of font colour is inconsistent and can make things hard to read
there doesn't seem to be a way to recharge energy so i guess you just die over and over and pick the crystals back up?
it appears too unfinish for me to fully get whats going on
but the opening cutscene thingy was pretty neet, the illustrations worked well