Thank you both!
Hm I don't really know, worked on it in my spare time over the last ~12 days.

Yes, it's not logical but this section was never meant to be realistic. The thing the player has to notice is that Superku's reflection on the giant ice block is off to the point that it mimics the player's movement mirrored at the middle of the block. Then you will have to use your own reflection to navigate across the invisible blocks, thus with left-right-inverted controls.

Things like this are rather common in my levels, esp. seemingly solid blocks which you can pass through and oftentimes reach secret areas or find shortcuts this way (similar to 2D Metroid games).