Thank you for the kind words! I was really happy with the sound design in this game too.
And yes, I honestly really agree with the point about the mechanics not being very intuitive. I sort of ran out of time before playtesting enough, so after I submitted the game I realized that I never explained how the teleportation logic actually works (so I quick-fixed by explaining it in the How-to-play section). But 100% you're right. The player is instantly thrown into a level with hazards and no real explanation of how the doors work.
Thanks for the feedback, I'll definitely try to improve on the "teaching the player" aspects of devving!