Simple digging concept game. Couple remarks that would improve it at baseline (except obvious "more content" remark):
- Energy - I don't understand the game design benefit of energy in this game. It neither makes the game more fun or more difficult, just a hassle. You can make sure you exhaust yourself without picking up anything to die but ultimately restore your energy, the scaling of energy to money gained can also be unfair early on.
- The rocks fall through deeper into the sand frequently as you attempt to extract them. Does not seem intentional and feels buggy.