Thank you so much for the detailed feedback! I made it so you can adjust the brightness of the game but contrast is a good point, should check it next time. I can see how it makes it frustrating.
And yeah every room has a different completion speed, the spiral is probably the slowest one but if you can get the turning and camera just right (which makes you keep the running velocity while climbing), it becomes the second fastest room to complete, glad you went into details :) Thanks for giving my game a chance!