Holy amazing crazieness.
That is an INCREDIBLY fun game. I cannot express in words the fun i had going through both campaigns. I do, however, have some feedback for you.
Things you did well: Nice weapons choices (rockets), exceptional stage/level design, good graphics, nice power-ups and placement of them, perfect amount of speed, great damage ratio, nice range.
Things that need work: campaigns ended too quickly, MUCH more customization, more stages to play on, more epic music.
As you can see, the things you have done well clearly out-number the things that need work. This overwhelming amount of perfect things completed is easily noticed in-game.