This game is stolen, if you look at bubbleboxZ's profile, it was made july the 9th... Why make a new profile to post something from an author that already has an account on Kong which they use frequently to upload games? Just doesn't make sense to me.
I feel like I have played this game before... I felt there was no real strategy to this version compared to Rag Doll Cannon, its more of a "How many things can you spam before the monsters go in the right place or you get sick of the noise" sort of version. You can also shoot through walls/floors that are right next to your cannon. Enjoyable but it requires more work to keep up with its genre in my opinion.
I like the style of game your going for but as an improvement I would suggest this: Change the rabbits sounds and appearance as it comes across as one of the most annoying duo's in my opinion, make level transition somewhat faster as I dreaded failing a level simply for having to wait for that walk back to the level i was already on and it was the only thing stopping me from finishing the game. Overall you did well for a different style, you just need a different way to present it.
I also noticed if you hold space (Aside from the annoying sound) you can just jump off the top of the water in some levels without any actual planning.