Pleasant
There's some nice stuff here, and a good variety. Some of the effects were great when moved around quickly, some at a slower pace, some while staying still.
In particular, rotating stairs really caught my attention, though I never could get the effect to work except in small bursts. Creature in the water is really beautiful and elegant, and I'm very impressed with how you made something that organic looking just out of squares.
The one thing I'd say is that some of the effects could afford to be a bit shorter, especially the explosive or rapidly shifting ones. After moving my mouse just a little, the screen got extremely cluttered and the effect was lost in the confusion.
All in all, good work.