Very fun but..
GLITCH: About halfway through the game (wave 20 something) I bought the big ball of light and i used it. And after i used it the game started bugging out. It brought me to the building screen but enemies kept coming, and everytime i clicked begin wave it would instantly end and wouldn't let me attack, just kept bringing me to the building screen. But the big balls of light didn't go away, i was able to place multiples and I eventually reached wave 40 and won. Overall fun game though.