The game is quite difficult if you plan to use your S key with the ice skating physics, pretty much requires you to either rewind afterwards or use the accelerate key in the other direction if you don't want to be ran over but I'm guessing that's intentional.
One problem to me is that you decrease player velocity while they rewind so if you don't keep pressing your direction keys then you will have to accelerate all over again and will probably get ran over. I would have personally made their speed carry over in this state or even stored their speed during those rewound frames.
I have no idea where Jams stand on copyright and trademark infringement but this game is definitely pushing its luck haha
The environment art is good but the character could use some work, can't say a lot about the music because its the actual BttF music as far as I can tell.