Beautiful colors! Controls became very intuitive. It's a really unique and satisfying concept.
The float mechanic is great. But it would be interesting to shorten the stamina meter. I didn't feel incentivized to think about the gravity, as I could mainly hold spacebar and essentially float anywhere I wanted.
Also, it was really cool finding out that I could shoot lasers through the portals! Overall, there's some awesome opportunities with the mechanics and I'd love to see it explored further.