I love pixel art, so you already had me there.
In retrospect, I guess seeing the mouse cursor should have clued me into the fact you have to click the sticky notes, but I still think it could have been communicated better. The first note had a drawing that didn't mean anything, so why would the arrow be instructions? My brain put both on the same bucket as decoration.
And sticky notes are just not dangerous, which made it hard to realize I was dying to them. I even thought the drawings themselves were killing me somehow.
Still, very cute and fun. And I didn't find any bugs except the intended one.