[dsil]

I played through it. There's 5 "tests", and it took me about 2 hours, though now knowing the solutions I could play through again in probably 15 minutes, so it just depends how long it takes you to figure them out.

Overall they're very good levels. A good bit more difficult than the base game, and most of the other user-created levels I've played. I was a little surprised that a couple places were more about reflexes than brainpower, since I assume they're looking for good problem solvers rather than good first-person-shooter players. But in general, very good puzzles implemented very well.