It's a game, there is art that generally look recognizable, the menu theme music is nice, and the game music is exciting enough, if muffled, similarly with the huffs and death screams.
While the art is pretty much comprehensible the hitboxes attached to the art don't feel quite accurate, and the obstacles don't feel like they're attached to the ground, the stalactites, stalagmites and bone piles seem to slide toward the player, rather than the player running toward them, and the bone piles disjointed explosion doesn't do a very good job of letting the player know they're stumbling backwards, losing ground to the mole rat king. A less bombastic animation for the pile, and maybe an animation for the miner nearly falling would likely translate what happened to the player better. Also there's an odd shaded box around and slightly behind the miner's head?
The bar at the top of the screen showing how far you are from death, and the position of the miner on screen don't seem to have a whole lot to do with when you lose, other than you probably won't when you're on the right half of the bar. If you aren't the mole rat king can attack(?) and you lose, though the miner is not much closer to the king. If you get stuck behind one of the seemingly, entirely randomly placed rack formations, and get pulled off screen, the king will just keep running, as you have entered his death field and are no longer relevant. Sliding seems to change what animation the miner does, and nothing else, so the fact that it's a computer only feature, doesn't matter at all.
Lastly, the score system seems to not work for me, for some reason, possibly vpn, possibly a bad server, I don't really know or care all that much, but since I played it and saw a number of things that could be better, feedback seemed appropriate. I hope making this has been a good learning experience for those involved.