According to the docs:

"Q: The keys are not responding fast enough. What should I do?
A: We corrected this problem in version 1.0.2."

No, you didn't. When I hold down the left arrow key, I expect PacMan to take the first left turn he comes to. In reality, he often skips that one and turns at the next left instead. This is because it takes too long for the program to realize that the left arrow key is held down. That makes the game pretty pointless.