Really plowed through this today, and I’m now up to World 7 (out of, it seems, 8). In fact, I only stopped playing due to the battery in my DS coming close to running out. Things are getting somewhat harder now, with lots going on at once to worry about – things flying at you, electrified walls, spinning spikes and all sorts all at once. Luckily, there are plenty of restart points, and lives are easy enough to pick up. One annoying thing, however, is that all the lives you’ve gained are lost if you quit the game. So, when I go back to playing, instead of the 20 or so I’ve racked up, I’ll have three.