8 solo levels (and a couple of net levels) - this is a very nicely laid-out project (and quite difficult in parts). Mapmaking is very high-quality, though there are some minor annoyances (at one point, you're required to make a series of jumps from ledge to ledge - miss one, and you have to start over... and over.. and over; in another instance, you'll find yourself inside a beautifully constructed building maze - but the beauty wears off after you've been wandering through the same corridors for 30 minutes; and so on). Overall, flow is great, though, and the gameplay will keep you wide awake. Definitely worth playing.