Wow really love the little physics interactions with shoving stuff around and all the great pixel art. One of the few games I played all the way through!
If I had to give some feedback I'd say it wasn't immediately apparent to me what the second flask I drank did for me (if I'm correct the first one unlocked the roll?) and I would love to have seen some slightly more varied puzzles for the buttons - like sliding other objects out of the way or pushing the other little dudes around to trigger something. I know designing puzzles can be tricky and time consuming though.
Overall awesome game and I'll probably check it out again when I have some more free time to find the alternative ending =]