I will second Cuphead. Fair warning: it’s really difficult in that old-school sidescroller way in that you will lose many lives and you will have to try the levels again many times. But it is far and away one of my favorite games ever because the developers hand-animated it in 1920s rubber hose style — I’m talking frame by frame, by cell. They have a great art book too if you really take to it like I did. 😅
! Book.