It took me an embarrassingly long time to figure out that I hand to click the stars to gain mana. However after learning that, I had a blast with the game! I played on trackpad btw lol. Loved being able to cast spells as a tower defense game. Feels like making a spell-only deck in Clash Royale.
I definitely feel like the spell should have been toggleable with number keys, or even made draggable. This would kill as a mobile game. Could use a lot more visual polish and different enemy types.