Cool concept!
The platforming can be pretty tricky and is challenging. But, in that sense also made me want to beat it.
It took a bit to grasp the concept, cause I think intuitively at first I wanted to match the colors instead of doing opposites and therefore just fell through all the platforms at first.
I found the best strat was to switch dimensions at the last second to still see what was going on in the different realm, and also get the platform to turn 'permanent'.
The checkpoints and permanent purple platform are a god's blessing for keeping the progress, cause it can be pretty hard to determine what actually killed you and you have to start over.
Especially in the last part. I wanted to speed through the last part, but if you run too fast the homing bullets of both colors are hitting you at the same time - so, you always die. So I had to go step by step at the end to not let the bullets spawn at the same time.
Also, I found later on that you are supposed to drop through the lasers right? At the last checkpoint I jumped on the left blue platform to skip all those spikes ;)
Was fun to play! Nice work!