It's beyond incremental. I can't earn any crowns to upgrade past the initial ones. Therefore, I can't win. Therefore, it's not worth playing. Unless there's some better instructions I'm missing. Way too incremental for me. I feel too much failure to want to keep playing.
Please make the unit cost text bigger. It's tiny, even in fullscreen.
Is there a way to control the knights or use strategy (like target enemies closest to the tower)? Can I see my knights' HP?