FWIW sometimes when making games it helps to have everything in one place, even though later you may want to split things up for later projects :-P so sometimes you get big balls of mud with lots of checks everywhere for the actions you want.

As an example, most of the gameplay logic for Post Apocalyptic Petra[0] (a 3D platformer/adventure/riddle solving game i made for an MSDOS game jam a few years ago) is in the entity class for the player character[1] - including things like collisions, etc :-P. It is a bit hacky, but it works.

Though if i ever made that sequel i wanted to where i want to have an extra character following you around, i'd need to move a bunch of things to other more generic places so that they can be shared by both the player character and the AI.

[0] https://bad-sector.itch.io/post-apocalyptic-petra

[1] https://codeberg.org/badsector/PetraEngine/src/tag/pap-0.99o...