Version 0.7 is now available, but I'm sure there are a may-raid of bugs and errors. If you find one then let me know, I can't find them all.
I've packaged the demo now in an installer, just run it and follow the on screen instruction. I've added the upgrade feature but it's not working as it should, I hope to have it working before it gets to version 1. But till then this one will have to do, and I've made it a bit harder, the bubbles will now move faster after round 1 and 3.