Frankly mindbending, with a level of polish and ingenuity I wouldn't expect from a weeks' worth of work. There's so much content here, and the puzzles are devious without being unfair. The solutions don't present themselves immediately, but the levels and mechanics are presented in such a way that you're given more than enough to 'go on', and the satisfaction at both figuring out and then executing a solution is brilliant.
Excellent job.