I just started making this game.
If everything goes according to the plan, people will join me and make thousands of levels and it will be the most fun and famous game in the interwebs.
But I'm prepared for a more meh future too. In fact I'm just having fun.
I'd like the game to run on Chrome, Firefox and Safari. If you see a problem on those browsers, bring it to my attention (right now I'm been told there is a problem on Safari but I can't test). I know there will be glitches on IE, I don't want to spend time on that.
In the future I might support touch events but the main problem of mobile platforms is the screen's size.
If you have ideas, or want to discuss about SpaceBullet or the underlying technologies, or just want to say it's a good looking game, don't hesitate to join the dedicated Google group.
SpaceBullet is open-source. See it on Github : https://github.com/Canop/SpaceBullet