Wow, thanks so much! Very glad you like it. The physics and sound were definitely some of the things we spent the most time working on, and I think we were all a little surprised at how much we ended up liking the end result.
There actually already is a way to transfer your goo into health: Once your Goo bar is at least 50% full, you can press E to spend 50% of it to regain about 25% of your total health (but I don't blame you for not noticing that, that's one of the biggest things we wanted to improve after seeing people play the game). We're currently working on tutorial video because there are a couple mechanics we don't explain too well, so hopefully that will clear things up for other players too.
At the very least, we'll definitely release an updated build once the jam is over addressing the current bugs. We do have some ideas though, so keep your eyes peeled... Again though, thanks a bunch for the praise!