The levels are much more varied and interesting this time around, and the added setpieces end up creating some really fun gameplay scenarios, like the fires in Stage 1 and the wall-climbing thing in Stage 3. Stage 3 in particular is a highlight, both in terms of design and music. The bosses are all awesome too.

I'm not a big fan of the top-down stages, though, as they don't have much going on. They feel rather sluggish compared to everything else. But, the four excellent sidescrolling stages make it all worth it.

Not too much to say, really, just a great, fun game. Even greater in co-op.