Thank you so much for playing my game. It means a great deal.
I chose the upside down approach because I wanted to have the cannon change positions on the screen, left, right, top, bottom but there just wasn't enough time.
You are right, it is time to add some music and particle affects.
I am going to add some bonus ups too:
If anyone in the community can think of anything else that might be cool to add to the game I would love to hear it.
Thanks to all who have played the game, it is greatly appreciated.