I love the art style, the music, even the game's page, but the waves never get any harder, just longer. and so there isn't a lot of depth to the game. even just 2 more units, hell just putting the units closer together in the waves would've made this 4 star game into a 5 star. jealous of your abilities in graphic design though.
this is all you need to make the entire game pointless. I can't even see the enemies anymore.