As has been reported over at ICO, the cross-platform arcade game No Gravity, formerly known as Space Girl, has been open-sourced in its entirity. Until recently, the only version available for BeOS was the demo.

However, the developers are looking for help in getting the current version running properly on BeOS again, as changes were made since last time it was synced up with BeOS. If you think you can help, the source is available at the games SourceForge page