The art was really pretty but I think the color swap mechanic might be against the rules?
Overall very interesting idea. It felt like the old Kaizo Mario fangames so I did enjoy my time. Sometimes tho solutions to puzzles seemed very brute force and didn't make much obvious sense. I'm mainly talking about the many invisible platforms and enterable walls.
EDIT: I did misunderstand the color rule. I thought a game could only have 4 colours in general. Thats my bad!