I had a nice time going through these levels. The characters I enjoyed the most were the ones that had specifically player movement altering ones. The red one with their jump power up was my favorite to be since the jump lent itself to traversing the environment in perhaps unintended but fun ways. (Like jumping around barriers instead of getting a cube. I think this is kinda a pleasant option to keep in sometimes though even if not intended)
The camera was a bit hard to control but I think that was mostly just me being unused to the directions that mouse movement defaulted to.
I think the blue and red challenges were the most fun overall but I was glad to go through all the levels. :>