Despite there not being many differences, this is a huge improvement over the original level. The music is enjoyable to listen to, the Bully part isn't stupid anymore (and is actually kinda fun and unique due to the cliffturn=1 and playerblock=1), the Mouser part isn't stupid anymore, and there are even some clever secrets added in, like the key-keyhole exit and third SMW star.
However, this level still has its problems. Anyway, first thing's first:
You misplaced the Player Start Location. Normally, this would be a bad thing, but since the way up here isn't indicated very well (I recommend moving the coin up by four units so it's
above the invisible block), you actually dodged a bullet by doing this.

Also, the door's effect sprite is incorrect:

Lastly, while the Mouser fight isn't stupid anymore, it's still quite boring since it's just a Mouser in an empty room, and it just seems like it's there to pad out the level. If you want your level to have a boss, either add other hazards to the room or just don't have a boss in the first place. I actually made a tutorial to explain what to watch out for if you want your level to have a boss that isn't boring, but also don't want to put forth much effort:
http://www.supermariobrosx.org/forums/v ... =81&t=8890
(I know this level was uploaded before I made my tutorial, but I'm linking it here so you know what to do for your next level)
Summary:
GOOD:
-Graphics aren't terrible.
-Music fits the level well.
-Bully battle is fun and unique.
-Secrets are subtle without being unintuitive.
NEUTRAL:
-Unintuitive secret mitigated by misplaced Player Start Location.
BAD:
--PRE-PROGRAMMED AI IN AN EMPTY ROOM.
-Incorrect effect sprite.
In conclusion: Despite the Mouser in an empty room, this level is quite enjoyable. I'd say this deserves a 6/10.