Played your game and gave you first impression! Fun little game. Solid :-) 

good polished game, nice sfx, nice pixel art. good job!

Very nice< You should add an end to your game.

very neat game!

love me a good play, die, upgrade system :D love how it ties into the limitation

would be neat if you spawned in different spots, got caught always falling in the same hole, but neat that you can move in the air so not big of a deal

fun stuff!

Good concept, it is actually addicting. I guess if spawning tile was a little bit randomized and jump would add some decision making and planning. But thats me enjoying the game talking. 

Great entry!

Neat game! Nice concept, I like how it's not the same person respawning but different miners. The pixel art is cute and nice and the SFX is very well done.

Some points of improvements:
I think maybe a jump button and a mining upwards button might help because sometimes I accidentally mined down but I can't mine above me.
There isn't really a goal, at least not from what I understand, I think adding a goal or making it clearer would be nice. 

Overall it's a really nice game, so good job :D