This voices were funny and the challenge was pretty good. A bit of thought required to win some of the levels, but if that wasn't the case this wouldn't be a real puzzle game. A few small bugs, a random death here and there for no apparent reason. If I had one real complaint it would be that portals were "tutorialled" poorly. The small visual effect displaying that there is a "suction" portal and a "discharge" portal helps, but the explanation never really hints at that at all. The concept of portals are typically assumed to be bidirectional. I think allowing the portals to switch directions allows the puzzles to be a bit more complex and isn't a bad idea in and of itself, but it should have been explained better, is all.