TO FIND THE M: Find the area with an upside down U in orange (it has a large piece of cheese and an apple in it) that has a large purple square around it, with a purple rectangle at the top that you enter in from the right side. There is a piece of cheese at the end of it. Press up and left as you enter the screen and BAM. Secret room.
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Pretty good, entertained me for a while.
Good sound, nice animation, but needs a little more in my opinion, like reaching the pedals, or making it a little more interactive.
Overall, a solid 5/5 for no major flaws!
Keep it up!