The DSiWare version appears to have about five worlds and I played through some of the first world. They were all focused around moving blocks so that way you could direct your Minis to the goal at around the same time. Once one Mini gets to the goal, the rest have a small amount of time to get there before you lose.
I did not get to experiment with the level editor, but apparently this feature was actually in the previous game in the series.
Based off of my small playtime with this game, I am very excited to purchase it next week when it hits DSiWare.
