Game is pretty cool, the aesthetics are 10/10!
I didn't understand how i can use the box of dynamite on the big boulder (i guess it was dynamite). I accidentally threw away my upgrade pickaxe for this. So i guess an overview of the controls would be great!
Cracking rocks was quite fun, but there seems to always be a little lag when they spawn the small rocks. The small rocks are sometimes also annoying when trying to pick up the valuables. I was just spamming F at some point. Maybe some priority to "target" valuable pickups first might help?
Also the hallways after the lava lake were a bit too dark, i couldn't find the pickaxe i dropped because of that.
The start was pretty cool with throwing rocks at that lever, but i was kind of missing puzzles like that going into the cave. It seemed to me that im pretty much only hitting rocks all the time with little things to do otherwise..
Great, promising game though! Keep it going!