Very cool. I like how you got the gears to fit together. The water shader is really nice. The first playthrough I went straight for the crossbow. Around wave 5 I realized the gears degrade and the crossbow loses efficiency. I died. Second playthrough I went straight for the other direction instead (I noticed a gear there but never made enough money to reach it). That's when I realize you could just mine gold directly. Spent that playthrough focused on gold, and won the second time.