I struggled a bit with this game, I would randomly die and respawn not really sure why. I did notice the trick to dealing with guards but everytime i got caught my echo didn't follow my path when I reset.
I do think this game has a lot of promise! it had a cool theme behind it, I love the puzzle aspect of the game. And for your first game jam this was a lot of work and done well. I know it can be difficult to have it running smoothly without bugs in such a short time span, so really you guys did well.