Interesting idea, doesn't feel like a real fit to the theme though (but then, whose game does anyway?)

Get's boring really fast, it needs some more elements.

Kind of neat. I think I would have liked more enemies/reasons to switch dimensions. As it was, I could just stick within the shooting dimension comfortably.

Interesting, especially when I first tried switching dimensions. Pleasantly surprised ! :)

Surprisingly challenging.
Graphics and sound minimal but functional. Music isn't too bad.
Didn't buy the "connected worlds" theme at all.
Some innovation, but essentially boils down to a shooter.
You get a 3 overall because the core gameplay, while simple, is pretty good.