Hey, thanks for the comment. I'll try to explain the mechanic as best as i can... It's a little bit confusing.
1. You can switch between two dimensions: orange and blue.
2. When you switch the dimension, your body also switches its color.
3. The color of your body is always opposite of what you see. For example if you see blue platforms, your body is orange and vice versa.
4. You can only touch / collide with the color of your body. For example if your body is orange, the platform has to be orange as well if you want to jump on it.
What that effectively means, is when you can see the platform that you want to jump to, you will fall through.
What you need to do is, switch to the other dimension (so that the platform is invisible) and jump towards where the platform was.
You will basically stand on nothing for a couple of milliseconds until the platform gets corrupted and changes its color.
From then on the platform will be in both dimensions. I encourage you to give it another try and let us know if you liked it :)