Nicely done puzzle game! I would keep the real-time aspect of it -- a lot of people get turned off by tedious turn-based mechanics. And definitely keep the "rewind time" feature. What an excellent way to try something different without having to start all over! 

I tried the feature where you slow time down, but I think it would be more helpful if after X amount of time you highlighted a certain square to give you a clue of where to go.

I feel like there should be more time to observe the level before it starts.  Because once the countdown hits 0, the foxes have sometimes already started moving and the player is still trying to get oriented.

But other than those two things I think your game is on the right track, it's an interesting blend of puzzle game and Pac-Man.

I tried testing this game on Linux (Lubuntu 22.04 LTS), and it doesn't work.  Error message:

./Peppy: error while loading shared libraries: libGLEW.so.2.1: cannot open shared object file: No such file or directory

(I do have GLEW installed, but it's at version 2.2.)