Thanks so much for the feedback! I'm really glad you enjoyed the menu design! About the door, the amount you spin the wheel actually determines how high the door opens, so the different opening heights are intentional. There are also subtle hints on the ceiling throughout the level. Sometimes they indicate where a trap is, and other times they show the safe path, so players are encouraged to pay attention to their surroundings. That said, if those hints weren't obvious enough, I'll keep that in mind for future improvements.
Thanks again for playing and for the thoughtful feedback :D