Interesting idea, there is a storyline, transition between game dimensions and linking to the theme. There is a lack of menus, in Bert's house you should add walking diagonally and do something about the camera shaking when you walk into a wall, also add a button to skip text animation, or speed up its appearance. All in all, the main thing is that there are no critical bugs and errors, and the game is playable and enjoyable, so great job!