I put the prisms exactly where the picture of the solutions page has marked them, but it doesn't destroy the upper left box, did anyone else notice this?
How do I solve this problem?
I found the way, you just leave the left upper box alone, and destroy the other 3 boxes, with the prism you should have left, you can change course of thye lowest rainbow spirit, it will retrieve the last coin for you, then hit the exit.