Fun game. Seems pretty polished. I saw a couple spelling mistakes in the skill tree.
Also, the "Reset Progress" button should have a confirmation...
Level 27 seemed like a huge jump in difficulty. I quit on that level because it seemed like I'd upgraded everything, and with all the contraptions, half the map was permanently disabled. IMO, some balance is needed.
Visual clarity could be improved to tell what is disabling, and what is disabled.