This game felt like a realization of the levels you'd draw on the back of scratch paper in elementary school, and how the implied mechanics turn into something much more in your head. Imagination and implication are really powerful things for games, and I like it when games are honest about using them. Doors that you can't open are frustrating, but a game that honestly instructs you to imagine is pleasant, if gauche. Have you read Yoko Ono's Grapefruit?