It looks very clean, I'll give it that. I'm sure you'll get to it eventually, but it seems like it needs something in the upper-right of the content section, next to the Introduction. Perhaps something that integrates with something hanging from the header. A view of a mock game could be up in the header (at least on the right half) hand the map could continue down into the content section.
Like I said, I'm sure you'll spruce it up a bit before it's finished, and it does look clean. One other thing to mention is that the theme of the page seems like it's taken right out of a template. Blocks are nice and all, (heck, I've used 'em myself on a few occasions) but it doesn't match SGDK2. Maybe it could use sprites in the corners where the blocks are, or fade to the grey/white background that SGDK2 uses (and other programs) to signify a transparent area. Or both. And if you used background-attachment:fixed it would look even better. It would look like it does in SGDK2 when you have two layers with scroll rates of 0 and 1.