An interesting idea. I like that the goomba has unique movement. I also think it's clever to have mario and peach chasing after the goomba, rather than just moving back and forth. The chasing after mechanic did however make the level easier, since mario and peach would intentionally line up under the goomba.
My profile ended up not getting attached to our game, but I worked on the submission: Dungeonmeister Meisterdungeon