I think one of the main problems with physics puzzlers is only letting you interact with a few choice objects. Ozee lets you play with almost everything on screen.
It's very good, but it's hard and needs checkpoints and less delay before a jump. Many times I missed a jump because I pressed jump at the very edge of the platform and then had to start from the beginning.
I don't want to shop and fight and take care of my "critter". I just want to evolve a cool creature without any hassle. I know this comment will get a lot of minuses but I don't care, this just isn't my thing.
There should be alternate routes to hard to get to rooms. These routes should be hard to find but available to someone who prefers to stretch their mind over their wrist.