Wow, I'm surprised you still don't have 20 reviews, I think this entry definitely deserves a final score!
Visuals were really impressive, maybe some materials were a little too shiny but overall it was a nice, realistic style. The level design was in my opinion the strongest aspect of the game, the swapping bodies mechanic let itself pretty well to different setups. It kinda reminded me of Portal in some bit, and that can only mean good things. I also really liked the way you handled the tutorial, introducing the player to the controls of the game in a nice, interactive way. But I have to say, I'll never forgive you for what you made me do in the final stage :'(
Performance was obviously a little sketchy, but I know you're aware of this. There was also one particular level (the second to last, I think) where the pieces of the puzzle were a little bit less clear than in other levels, I ended up brute forcing my way out of that one somehow lol
So anyway, I think this entry is really good, if you fix the technical issues you have quite a complete game here, good job!