I think that Mario games could learn something from this. I think there are ideas in here that Modernise a Platformer. Like the shop. Having something to use your coins for, and not just that but also being able to buy upgrades with that. The Mario platformers just let coins tick up in the corner. Pointless.

My big issue is collecting all the Toads to unlock the final boss. I’m not doing it because I have better things to do with my time. There are so many toads, I’d be there hours. Making collectibles integral to the game defeats the purpose for me. They should be a side thing that will net you something worth while for your effort, not unlock the ending to a game.