It would be awesome if you can let us know what bugs you've encountered so we can look them over. Giving us those videos so we can see exactly what happened will be very helpful.
On the level with 3 purple doors, when I try to complete the platform section, pushing the blue cube under one of the platforms just causes the platform to "eat" the cube, and the cube disappears. Thanks for making this post :) Sorry I don't have a video but I promise that's what happened.
If I'm thinking of where you are correctly then I didn't encounter that issue at that point but after a few attempts to kill the gaurds, I went straight to the middle button and morphed which opened the door for me.
