I was impressed to see a 3d game. I had a tricky time with the antigravity. I would clean some goo and then get flung out into space. I didn't see any indication of when the goo would explode but maybe I missed something. The first time, I was fumbling to just out of the ship, so that took a while. Once I cleaned too goos, I got the line that preceded the ship exploding, in my second playthrough much sooner than the first, so the explosion doesn't seem to be based on the time you spend trying to clean. 

I also appreciated the Portal 2 references as it is one of my favourite games!