Thanks! The source is here: https://github.com/jlongster/octoshot/. I haven't added a link from the game yet because we weren't allowed to modify the game until the winners were announced.

Yeah, I'm kicking myself because I've since solved that collision bug. The quadtree was simply too short so sometimes the system didn't perform collision detection on the player.

I have high hopes for what this game could be; if I add some different weapons and different levels, I think it could be great.

Thanks for the feedback on the terrain, too. I wasn't sure about it, and I've since gotten rid of it actual (more in favor of indoor levels). But you may make me rethink that.