I've played about half of this, I think. It's very difficult, but deepens the more you play it. At first I thought it was a basic brawler, but then it can also be a side-scroller (by Konami!). The mini-games are so much fun too and add so much to the experience. The quirky designs throughout are the best part. Cool music too.

Will definitely finish this someday (I got to a spot that I was unsure of how to procees) and play more games in the series. I love this game!