Beautiful Little Game, would love to see more Polish.
The Main Menu is annoying with that writing and you are not able to skip it. Takes to much Time and is not fun.
The Gameplay itself could be a little more faster and an Animation when you are digging those Rocks. The Upgrade System was kinda unclear what exact resources you need to gather. Some Icons for that would be better instead of a Character.
A good Job with more potential, keep it up