I really like how your game looks. Nothing really seems out of place, which shows the effort you put into it to make everything fit. Fitting levels to look like tapes is a nice touch and the audios great too. If there's one thing I'd try to balance, it would be the fact that the player is both invincible and destroys enemies while rewinding. Having an option that is both defensive (invincibility) and offensive (kills enemies in one shot as opposed to the blaster) means the player is encouraged to just spam rewind instead of dodging.