speed upgrades are pretty underwhelming. power is like 100-500%, speed is 10-20%. for the same effective value/second, it's not wise to buy speed, and that's lame
needs some sort of undo button. i forged my Fire Tower into something else, thinking the Snake Tower was better in every way; later, I realized: snake towers can't hit air and the lack of targeting priority made snake tower strictly worse than fire tower in every situation.
Whats those two buttons in the top right corner of every screen?