UPDATE (11/5): A working exe of StickBall is available here: StickBallClone-master.zip
Just download, unzip, go into the StickBallClone-master folder, and double-click on main.exe.
Hey I didn't realize about the time zone being a couple of hours ahead of me -- I won't push my latest changes to github as it sounds like we are now past the deadline. My entry is posted above, with the link to the Github page, where you can check and see that no changes have been pushed since the deadline. Well, here's the link again, for easy reference, but it is included above, prior to the deadline: StickBall on Github.
If you are on a PC, it requires Ruby to play. Installing Ruby on Windows is really easy, and install instructions are in the Readme (on github). UPDATE: It appears that Ruby Dev-tools must be installed for StickBall to work properly. I pasted instructions for installing Ruby Dev-tools in a response to Aspirer lower on this page (the instructions come from wintertime's readme).
We were able to compile for Mac to a .app, but I did not post the .app prior to the deadline. The .app is the exact same as the github version - it just makes it possible to try it out on a Mac without installing Ruby. Ruby Install instructions for Mac are also included in the Readme, but it's a little harder to install Ruby on a Mac than on a PC. So..... I'm not sure if the .app would be disqualified for deadline reasons, but here is the link in case it is of interest: StickBall Compiled for Mac.
Wow, it's been a whirlwind of activity coming down to the deadline. Glad I posted a few days ago to be on the safe side!! Well, I think the game turned out pretty decent. We added in lots of sounds and a fair amount of graphics effects and I think it looks pretty nice. Following is a screenshot of what it looked like a few days ago, prior to finishing touches. Best wishes to all. I'll be checking out everybody else's games in the next few days.
Oh and a big heads up about the power-up controls: Ctrl is used for the Bump Power-Up, and Shift is used to cast spells. No button is needed for the Kick power-up. The Kick Upgrade automatically increases the player's kick speed. There is a small mistake in the readme about the kick feature.
Packaged .exe of StickBall: StickBallClone-master.zip