Mario must defeat a Giant Koopa in order to make the Zombie Koopas transform into normal Koopas.
Also included is a "censored version" which takes out the blood from the levels and the "LEAVE" sign from Koopa's Castle.
Update 1.2: The main reasons for this update is the addition of checkpoints to all levels (excluding Bro Bridge since that level isn't as long as the other levels) and added powerup blocks near the checkpoints.
This is a really fun mini-hack and is a lot of fun to play in your spare time. It manages to give you that Halloween feeling and I love the level design as it has lots of variety to keep fresh. This gets a 5 star from me.