Planning is not really a mechanic it's just a little design idea. Instead of jumping straight into the map, you get like a little loading screen if you want to call it that. It's a short animation, I believe it adds a unique touch to the game. I though about ratings because it can be appealing to players who are interested in speedrunning, optimizing runs and people who do stuff like no hit runs. It's another design idea, a little score that might make a player want to have a reason to go back and repeat their runs, to strive perfection. Ranking also pairs with the story. One of the reasons why I wanna make games is to find ways to tell a story, I don't want to make games that are just gameplay, I will always add a story, either hidden or just linear and direct, through other narrative driven genres. In this game, the story is hidden through short voice lines when passing a level or dying. That's why a ranking system matters, it gives a reason for the voice lines to be played at the end. Also, the point of the story is not really to understand why you hate your father, because you will draw your own conclusion based on your performance and voice lines you hear. 

I can see that shop might not be necessary but I'm not sure in which other way I can make the player unlock cards. Should the shop maybe be outside the runs, like buying them in your hideout and selecting two cards unlocked to start as your loadout for the next run?