I love the way the canonballs get extra speed when another ball hits it. Using this you can pretty much create a rapid-canon-gun by clicking as fast as you can... I would love to see the final score in the game-over screen.. I think I got six-figures :)
The hand-drawn graphics style was very well done. The gameplay is a little too simplistic and easy, could use some polish, but the game is still fun. Nice job.
Well, it didn't run for me. I left it there where it had created a console window and was trying to create the main window, and it looked like it was trying to load so I left it alone for 5 minutes. Came back, and it still hadn't finished, so I killed it.
Also nice touch to have hit enemies bounce each other off the screen.