Hey there. I like the main gameplay loop of mining and upgrading equipment, feels fun and casual. Progression is simple and it is clear what I have to do at all times.
My feedback is as follows (I played on the browser version):
Firstly, some of the font is blurry, especially the one to interact to open market and open shop.
Secondly, I think that it's quite frustrating to constantly run out of backpack space, and also the fact that mud and cobblestone can easily clog up your inventory. Especially later in the game when you have to dig really deep into the ground to get to the good ores, it can be very annoying to go back and forth.