I consulted this when making a pac-man clone, and it was a great resource. If you just go by what you think the game is doing from playing it, you'll end up wit

I consulted this when making a pac-man clone, and it was a great resource. If you just go by what you think the game is doing from playing it, you'll end up with something that "looks" like pac-man but doesn't "feel" like it. All those little rules and tweaks come together in an emergent way to make it special.