I figured some of the clues, like a tail showing from under the cape or an eye from behind the mask. Certain guests (or monsters) were identical though. Still, it leaves some room for pure luck and it's fine.
To me, it turned out unexpectedly engrossing! I love it, good luck to you!

I really like the concept. For sure it's worth expanding it

Cute game! Wish the friends looked a little different from eachother to make it harder, but fun concept!

I don't know what I was missing but I just clicked on random costumes and managed to get lucky. You had hints for checking the costumes but I couldn't figure out what I was supposed to look for unfortunately

Interesting concept but its quite a simple game really.