Not sure if you were inspired by it or not, but getting some serious Snipperclips vibes from this (in a really good way). I was also one of the people playing by myself thinking how it'd be fun to do with two players. I thought the central mechanic utilised the theme really well, and the legs having their own physics for Bob is really clever too. On top of that you've got a large number of levels too, just an all round great entry!
My only real criticism is that I wasn't sure if I played all the levels or not? It seemed like there was a branching path, and I went one way and then the game ended with no way to choose the other. It would be really great if I could just pick any level from the start, so that if I come back to the game later I don't have to go through everything. Either that or a save system. But that complaint is only because I feel like I missed out on a game I was enjoying 😄