Buggy mess. I have no clue what upgraeds even do (besides the obvious one like atack speed etc). Theres quality which i think increases gold gained? Attack damage doesnt do anything since everything dies in 1 hit. You move with right click but move upgrade tree with wasd, why not the opposite? The movement on the tree is so slow. The tree is procedually generated and upgrades overlap eachother. You can beat the game in like 5 minutes. My progression was from 100ish coins to 11k to 3,8 milion coins which lagged my game so hard it crashed. With 11k you are able to buy entire upgrade tree. Theres an idle mechanic but you might actually miss it. I wouldn't be surprised if it was AI generated since the status is finished and not prototype.