I just deployed an update to fix up the sad sound effect options. Before: ~200 bad sounding effects. Now: ~3000 organized effects (and some music too). I also added a sound browser interface to make it a bit easier to pick sounds now that there are so many.
The sound files have all been moved to Amazon S3 for faster loading, so this will make it a lot easier to add sounds and music in the future, as well as make it possible to support uploading custom sounds (not implemented yet). I'd like to add more music options, but I need to add some sort of attribution system first so that the music credits will be shown along with the game to comply with most Creative Commons licenses.
I also fixed up the Function behavior so that it saves properly when you select something other than "Sine".
As always, let me know if if you have comments, questions, or feedback.
Edit: as I mentioned lower in the thread, the object library panel has been enlarged.