Woah, I don't know if I missed a prompt or something to increase the window size but it was the size on my thumb on my 4k monitor. I see where you were going with the idea but unfortunately the "cannot kill the ghost" is already a rule in the game. Removing the power up that allows you to kill them isn't really a "no mechanics".
I think what would've been better is that you played as the ghost preventing pacman from progressing the level by chasing him down and removing all of his lives. That would've been sweet! Congrats on getting an entry done/submitted. That's never easy :D