Alright, it seems like you've been listening to my critisizm, because I really enjoy this level. In fact, before I have given you 20 negatives per level. Now I only have two.
1. after the underground area, why does luigi go through a pipe? You should use the jumping entrance
2. Why do you need to power boost in order to get the third star coin if you aren't fire mario? You should put it somewhere else.