to easy and to short
but i really love it
maybe you shoud take the gameplay after the first 15 lvls on in 3d mathamatic forms - coud be fun and a chalange to colorize a möbius ..ehm ribbon ?
sweet animations/style
but the concept of " you will die anyway " stands in the way of teh gameplay a bit
but evenso this makes the game unique in the defense game genre - so ist ok