This was a bit challenging due to a few things that caught me off guard:
1. When I solved the left puzzle in the graveyard, nothing dropped. So I ended up wandering around.
2. Even though I failed to connect the picture in the book with it's relevant room in the game, the clown has an issue where it doesn't open it's mouth when the puzzle is solved. However that was quickly remedied when I realized that I failed to use the frog.
3. The last puzzle. Tripped me up. I didn't realize what the numbers on the wall meant, even after watching a walkthrough of it, I was still stuck. Somehow it clicked, drank a V8, and I proceeded to beat the game!
LOL, so yeah in reference to #1, I had to watch a walkthrough in order to understand that something does drop when the puzzle is solved. That was probably the only one I actually had a real problem with since I did not see any indicator that anything was hidden or dropped.
Other than that, the game was challenging, but not so hard that none of the puzzles had hints. Well placed hints are always good, especially when you figure out what they were used for.
All in all, I really enjoy your games. Keep them coming!