This is a really nicely presented game; one of the best. You guys know what you're doing!
Good pacing, the puzzles are clear. Really nothing much bad I can say.
So just nitpicking:
1) It's frustrating that if I go towards an enemy that is coming towards me that we swap places. I see we have a wait button. But it's just a bit fiddly.
2) The theme is kind of only appropriate at a meta level, but not if you examine the game mechanics. I mean - if you know video games you know that in some games if you intercept the same square as an enemy, you die. But in this game, it's not clear mechanically that you are dying, or "failing". As far as I'm concerned, this is a game about phase shifting your consciousness into other bodies... which isn't failing! But like I said... it's a nitpick