Sorry for my late answer, I somehow missed this thread!
I just downloaded the game -- well done! It's very challenging! =)
Wow, it would be great if you could make this game open source! As the mechanics are easy to understand, that would be a great way for people to learn how to program with Sparrow.
As Freerunnering said, the optimal way to share the code would be to create a project for it on GitHub. That way, users can easily download the project (github creates a zip-file automatically) or the complete source, or even extend it.
If you haven't worked with git before: it's really a great tool, the time learning it is well spent! Here is a great tutorial that gets you started, if you want to take that path. If you want to share the code in any other way, it's of course fine, too. (You could e.g. simply send me a zip-file to host in the wiki).
Freerunnering, yes, that's a great idea! I will do that =)