I really liked playing it! Got all the upgrades.
The only things I prefer would be different are:
- Faster movement speed
- A little more rooms and mining tools :)
and
- Allowing to have all the equipment in your inventory and switch between it
OR
- Not upscaling the swap cost.
Because I switched to the staff and then it took me about 5 minutes to get the gems for the pickaxe swap, because staff was sooo slow at mining the needed gem. But after swapping to axe it took me 5 seconds to mine the remaining 200 gems :)
Also I don't know why, but there are two same workshops at the bottom left and top left for the staff (with different prices for upgrades somehow) :)
Overall, really liked it!