A lot of people seem to prefer Boomerang, but I like 2's approach more. Really allows you to get into the unique gameplay and enjoy it for what it is, and once you've managed to go from an empty lifebar to a full one by leeching off just a single enemy, feels so good.
Anyway after about 2 weeks of playing, I finally made it to stage 6. If enough people actually start playing this one I'll start up a proper high score thread, but for now, I recommend everyone give it a serious try and post your thoughts. Lovely game.

My best so far, default settings.
