I couldn't figure it out how to solve the treasure room, I tried to look at the walls but that didn't help.
EDIT: I got to the end with a little help from the developer and the last riddle was actually clever, hard but clever.
It's a bit frustrating that you have to start from the first room every time, I don't want to go through the same room that I've already solved every time.
Also the dialogue with the kidnapper pops up every time you're near him and in a game where you have to check everything in the room it's annoying.
Speaking of the music, it's Gymnopédie N. 1 from Eric Satie without the melody part, I love that chord progression but you could have come up with something original.
The sound fx sound good but they are out of place sometimes, the walking sound it's like a woman in high heels on a marble floor whereas the player looks barefoot, also the door sound triggers every time you reach the end of the level even if you collide with a human or the void.
I liked the pixel art, very solid.
Rated!