Very cool! I love the atmosphere the game gets from the sound effects and music. :)
And this plays really well. Not too difficult. If anything it could stand to be a bit harder. The hardest part was finding places. I think a map would have helped. Even if not one that shows location but only the general layout to get an idea of how the areas are arranged.
I didn't play your earlier Scooby horror games, but I may have to go back and look at them now.