This is a very well done advanced game. The puzzles are pretty difficult, and after playing for quite a while I just got stuck. The music was a bit maddening after a while. Maybe change it to a longer type of loop with more variation, or add different tracks for different rooms as someone else suggested?
I love Courage the Cowardly Dog and have seen every episode, so I really enjoyed the game. The art was pretty spot on with the show. Awesome stuff!