I think Local Minimum has summed it up nicely.
I was able to play to the end of the game, but only after reading your comment here that the correct way to go in the first level is to the right. I highly doubt I would have found it without knowing that. The other levels were okay, but I was expecting more exploration of the optical illusion kind of thing. It may just be me, but I find it hard to judge distance when an object is toon-shaded, so the platforming was frustrating.

I have a bit of a weak spot for songs that build as you interact with the level, and that was pretty well done. I also liked the animated static textures in the last level.

After reading your comment bellow I discovered some of the platforms but then I got into a free falling warp cycle with no clear objective. I think the platforms need to show themselves clearer so the player understand what to do and look for. At least initially. The objectives, if not getting to where I was looping was the objective, wasn't clear either.

So, I like the basic idea of having a fps exploratory puzzle game with some odd physics and environment. I'm planning / starting to make one myself. But with those games I think it is extra vital to teach the player how to interact with the world in a clear and intuitive way or else the player gets lost and gives up. Especially initially. The world and everything odd will anyhow perplex and hopefully entrance the player.

You need to go to the right and find the hidden platforms...:D

There's nothing to explore and jumping to reach the platform is too hard and frustrating.

Looks quite cool, not sure how to get to portal, jumped about for a while but didnt get to it