wow, not so nice :/
yeah, it looks good, but accessability has suffered.
my suggestion would be to have some user defined critera / filters to choose from.
- not just presets: beginners, top and newest.
- show XXX tutorials at once (customizable while logged in?).
- automatic loading of the next page, when we scroll to the bottom.
- list view as an option to the "matrix" view, (as seen in famous stores like apple or samsung e.g.).
- briefly show other relevant topics / hits on a tutorial page.