as a game, its too simple. you need to make it more round, things as a mute button or a level system changes everything. try some games on that theme around kongregate, it can help a lot. i recomend Frantic.
as a prototype, just keep learning until you can do a game the same way you imagine it on your mind. practice makes perfect =)
man, looking at the games you have on kong, have you at least tried to make a *real* game? i mean, i am not a developer on kong, but i do study c++ and java. i know a bit of game design and i know that half of the games that get flames could be avoided with a simple "try your game first".
you speak of giving incentive to developers, but half of the games i played here recently don't have even a different idea. they are, most of the times, just a simple plain game that someone used to practice programing. of course they will receive flames. if you are going to make a game, have something different. if you are just training, think twice before posting it.
and if you stick with releasing it, learn to take critics.