This is a really cool concept, and I had a lot of fun with it. Trying to corner him and run into his path, or make him run into a different ghost was so much fun. And it was just as tense when running away from pac-man as it running away from ghost in the original game, which was really cool.
I also just want to add that it was very clever to leave a bit of red on the ghost so we can tell who we are when we are blue.
My one complaint is that the game doesn't seem to function on a restart well. The score continues from where it was and when I kill pac-man it ends the game.
I saw others said that there's a balance issue, if there's only one dot he will die getting it. You *might* want to fix that, but honestly I think it might be fine. Maybe there should be a timer along with the low score to see how fast you can kill Pac-man, and players can continually try to lower their time it took to kill him.
Good job!