The engine for a great launchy-shooty game is there, but the artwork is much too simplistic. With only two types of objects to encounter on the ground after launching, the game really doesn't have a whole lot to offer. The groundwork seems there, just keep working on it and you may have something that's pretty great.
4993. needs better graphics, objects and audio.
You made this from a tutorial. So has everyone else who's submitted this game. You changed nothing but the colors. It has the same slow catapult, the same fans, the same trampolines.
What it doesn't have is any background so you can tell when you're moving or music to add any interest to it.
Sorry, but it's not good at all.