I bought Bewitched. Initially, it was great, now the game is slow, what can be done to remedy the situation?

I PLAY TO BEAT MY TIME THROUGH THE PUZZLES, IT IS SO SLOW THAT I NEARLY FALL ASLEEP. THIS IS NOT ACCEPTABLE, ESPECIALLY SINCE I PAID FOR THE GAME. IT IS NOT MY COMPUTER. I DEFRAGGED IT, CLEANED UP FILES, AND EVERYTHING ELSE I COULD THAT SPEEDS UP THE COMPUTER. THE PIECES STILL FALL SLOW SLOWLY.