More than a side scrolling.
Awesome work you did in three days (i hope no one will tell you "poor effort"...)
Cause that's a real nice project you submitted here.
Indeed it's more than a vertical side-scrolling, the formation of the bugs is a key-element that brings strategy in the game. It allows you to shoot in every direction, each strategy having its strenghts and weakness.
The difficulty increases perfectly, so it's entertaining 'til the end.
The graphisms were nice too, and the drawings of the beginning quite funny. Nevertheless, i'm not sure i recognized which part of the human body was represented by each ennemy (does every human have some blue balls with teeth, spitting acid inside him ?). ;)
I'm not really found of the music but it was well-done and well introduced, and suited well to the atmosphere, kind of a mix of adventure and insanity.
So bravo for this nice little game.
PS : Maybe it's just me, but when i'm in fullscreen, the numbers can't be used any more to change formation. Would be cool to try to fix it.