Thanks for the feedback!
Yeah I see where your coming from when it comes to the flow of the game so we may have a look into how we could fix that for a update.
For the levels we originally planned to have 100 but due to time constraints we only have 25 in this version. We would like to make more levels in the future though.
For the door our idea was for it to indicate where the level starts and ends but I see what your saying.
We will take your feedback in consideration when it comes to updating the game in the future glad enjoyed the game the game overall though!