What an amazing game ! I really love the concept, especially because, during our brainstorm for the jam, the idea of "hey, our character could fall asleep/die/coma and have an irreal projection of himself that could do stuff" also came into our minds, but we just couldn't find a way to make it interesting, so we scraped it. Your "fake death" mechanic is genius, and is the final piece of the puzzle that we were not able to find, so kudos to you =) !
The game itself is very incredible. The general atmosphere is enjoyable, the graphics are very good, and I really like the "dream" visual effect ^^. The sound design is also well done : every action has a distinct sound and there is a little background ambiance that is really fitting and help with the game's atmosphere. The only little flaw I see here is the lack of music : I would have loved one, with a variant that plays while in the "dream world" =p. But, to be honest, it's just me being fussy, your work on the sound design makes the absence of music not really annoying.
The level design is also on point : the puzzles are clever and it felt really rewarding to find the solutions. There are a lot of levels for a game jam, and the difficulty curve is managed perfectly. The mechanic is greatly exploited and leads to really interesting scenarios : it completely blew my mind when I understood that I had to lure a guard in a pit for him to kill me. That moment made me say "Oh wow !" out loud, and I had to think about "do I really want to kill that enemy ?" for the next levels, that was soooo cool. A little complain about the puzzles is that I would have liked to know in advance the actions of each buttons, like having wires linking a lever to a door or a button to the spiked ground. My first attempts in a room were always trial-and-error to gather intel about "what does what" before being finally able to think about the puzzle. Games like Portal are a great exemple of this : every button is linked to its action, so the player can directly focus on resolving the puzzle. But, don't get me wrong, once I got all the pieces, it was really enjoyable to put them together and think about the solution !
The gameplay was smooth, dashing through the levels was enjoyable, even if I'm not a fan of the key-binding you chose ^^'. The game never felt unfair, and I always could do want I wanted to do.
Overall, that's a really, really solid entry. It's a great and polished game, and I'm really curious of what else can be done with that concept. I feel like there is a lot of potential for more complex puzzles : maybe having something like "sleeping pills" in later levels that the player could collect to fall asleep anywhere, without the need of a bench, or go full "inception" with dreams being able to dream and have their own projections, for exemple. In short, that is an amazing game, I enjoyed the time I spent playing it, and really I hope you will make something out of it after the jam. Congratulations !