Looks great, plays pretty well. The physics are very accurate to the original game, but the goo structures seems to have very little friction, so they slide around too much.

The main thing that annoys me is the retry button is surprisingly difficult to press - it appears that you have to click exactly on the white pixels of the text, rather than just anywhere in that small area.

Lastly, reading the signs seem to take priority over picking up a goo ball (or maybe I just misclicked a few times?)

Hopefully those things get changed/fixed. I can't wait to play the full version when it's finished!