Reasons this game is so good:
really nice graphics, all towers have attack animations, and the bullets are neither too small nor big. Also, the graphics fit perfect with each other and the color palette stays the same.
It's is very satisfying to play, I really liked everything.
All towers are unique and necessary.
The design leads to very nice looking "cities?" around the "eye"
It is impressively balanced, I thought at first, that I would be playing forever, but after reaching level 20 it was really fun to see my buildings just get fewer and fewer.
Things that could be better:
I didn't understand the "Select/Skip" mechanic of the game, was it asking to add these 3 cards on my deck, did I have to choose one of them? I still don't understand.
Well done!