In what way does your game fit the theme?
Firstly, 'rewind' is a word that can be associated with going back or undo something. Keeping that in mind, the players are devoid of the 'power of going back.' That is, a player can move forward, left, right, and can even rotate along its axis, but cannot move backward. It makes the simple aim of collecting the red boxes into a challenging one because now you must think strategically. Secondly, if the player reaches a situation where there is no other way of completing the level without going back, then the player must make the big call, that is, rewinding to the start. 'Rewind' in this game can be considered as a boon as well as a bane.

Did you write most of the code yourself and made all the assets from scratch?
Yes, I wrote the complete code from scratch and made most of the assets by myself.