In what way does your game fit the theme?
Mechanically the player character uses an ability to save a version of themselves and then rewind themselves back to that state to take on a boss-fight.

On a more narrative level, each time the player is beaten they rewind back to a point in their lives where the player can change moments of the character's past in order to buff them up/ make them more prepared for their present challenge.

Did you write most of the code yourself and made all the assets from scratch?
Yep, the vast majority of code was made by myself and I have rights to use all the assets I've used in my game!