I tried to make endless game where you can just collect as many points as possible, and the expensive rooms are meant to give more challenging timers and points when you enter them. The movement was intentional, since I wanted it to be completely physics based, I made the player start off at 0 and build up to max speed.
If you didn't try the expensive doors maybe try them out as they were the most satisfying levels for me personally.
Thanks for playing and hope you are having a great day!! :D