Fantastic job! This is very impressive for your first game*! The aesthetic is fun and enjoyable. I loved the music, even had it on in the background for a bit. The mage felt mostly useless, since most of the solutions were to push the priest into the knight. He's there to prevent you from just jumping over the edge, but if he's not involved in the puzzle, then it's the equivalent as not having edges.
Most people aren't going to know that they need to download the .pkg file with the exe, if they even see it. You should zip them up together and post them as one downloadable. :)