OK, i will leave some consultative feedback:
-Dig animations are a bit slow making the game annoying after a while.
-Nice random caves but you should put gems wherever it's possible to be mined. There are some places where there's no way you can mine.
-Maybe an ability to pan the camera a little lower so you can plan before you go?
-Enemies very stronk. Maybe start with easier mobs and slowly going down make them stronger.
-Good idea might be for the character to walk on Cells. One cell = one block. And not move on half cells (half blocks). REFERENCE : See pokemon crystal
-Chests with goodies, like potion of invisibility ( enemies can't detect you ) . Potion of mining. Maybe bombs and ropes. REFERENCE : see SPELUNKY
Good game brother. I will follow you. Follow me also and please give me feedback when I will eventually finish my game also.