This is my second game. I must admit, I've dropped a lot of basic things on purpose.
The game doesn't have a start menu because... what will I put there? Play and exit button? Why make a pause menu in a game where everything stops on every turn? I knew I wouldn't be able to find a good soundtrack in time, so what's the point of individual volume settings? I didn't make walls of text with hints because I thought they were just not needed. The R button restarts the level, as in all similar small games that I have played. I didn't write that at each level you need to reach the stairs, because there is nowhere else to go at the level. Sometimes the stairs are hidden behind a purple barrier that disappears after killing all the monsters, which is shown on the first level. On the second level there is nothing more than two skeletons and a barrier, so I did not write a separate text "kill all enemies". It seemed obvious to me. The third level is only needed for the end of the game, and the player initially has no choice but to go to the bottom of the stairs.
Instead of a bunch of basic and (as it seemed to me) unnecessary things, I focused on programming the rewind mechanics and visual style. In any case, thank you for your feedback! The whole point of a game jam is to learn how to distribute your forces correctly. I will try not to make the same mistakes in the future.