A solid idea that could expand into a great game! I enjoyed it.

I liked that each new building brought something new to the game. And the rush you get from unlocking bosses buffing bosses was cool as well!

Things I would like to see in this game are more buildings, more space to build in, and the increment timer reduced from 1s to 0.1s, so it feels smoother.

All in all, a cool little game :)