Finally found a workaround for my resolution problem and finished the 2.0 demo. I liked it a lot, definitely a big improvement over the first demo! My only potential complaint is that the puzzles felt very easy -- I solved all of them in only a few minutes, much faster than the ones in 1.0. Still, that's probably okay for introductory levels.
The first level looks like this on 1280x720. This is how it's supposed to look: Everything is visible and well-proportioned.
This is how it looks on my default resolution of 1280x1024. As you can see, the edges of the level are cut off. I can still interact with things in the edges, but I can't see them.