Very cool and impressive for a jam game, polished art, sounds, music, and interface! Unfortunately a few things hurt my enjoyment of the gameplay: First and foremost, the time slowdown as it nears zero is *extremely* unpleasant; once the timer gets that low I'd rather just restart the level than try to continue or wait it out. A button for instantly restarting the level would be nice, since a single jump or missed possession can immediately tank an attempt and it would be nice to seamlessly get back into the action. I found trying to swap souls while jumping to be very fickle; I noticed a shortcut but couldn't seem to take advantage of it because I couldn't get it to swap (even after getting the cursor to indicate I could) near the apex of my jump. Your body completely blocks the camera if you try to look nearly straight up, which I found to be an issue on the level introducing the hooks you can grapple to. Lastly, I had trouble using the short range burst to swap, no matter where I stood in relation to the other soul; I think this was only an issue on 1 or 2 levels so I'm not really sure why it would work fine everywhere else.
Overall though, a very solid, polished jam entry!