Just Bloons
Sorry, but this is simply a less complicated, and therefore less deep/interesting version of "Bloons". I'm also even less motivated to give you an higher of a score because you said you were too lazy to put in simple cannon power or gravity.
Despite this, the art of the balloons themselves was whimsically fun and at least what was there was pretty clean. Just next time please try not to make less intricate copies of games that already exist unless you're adding something interesting to it.