Pros: Legally distinct Grinch enemy is pretty funny.
Feedback: Player could use a bit more types of animations. At the very least you could pause the run animation when the player isn't moving. It feels odd that he runs in place.
The jump collision is also a bit odd. Sometimes I jumped on them and it defeated them. Sometimes I would get hurt instead. That made it a bit confusing if jumping is a good or bad thing.
It seems like you're getting the hang of creating platforming, now it's just a matter of improving upon your basics.