A neat little puzzler. The only hint I really needed was the one for level 4, but otherwise I was able to figure it out. I think I solved level 6 wrong the first time, as I ended up doing a sort of wall jump to get the purple one in place, but i went back and solved it a bit more "intentionally." I will say that, as someone who's colorblind, I had a hard time figuring out what goals were for which ones other than them either being on the floor or ceiling (something that didn't work on the last level).