That is a beautiful, clever game alright! Really, really impressive what you've managed to do in just three days. The gameplay and puzzles feel well thought through, yet easy to get into. The music is very calming, and good levels on the SFX. It shows that a lot of work went into this. Great job!
Some feedback: Sometimes you could hinder your progress with your dead bodies, like if you died mid air at the falling spikes. Maybe having a button for corpse disposal would be good! Also, I didn't understand that the magic circle was a respawn thing at first, explaining it just a bit more could be good.