As somebody who has done web design in the past, I will say that I think the space the "Create, Play, Join" buttons takes up (as in the background) takes up way too much of the space. I would go as far as saying that how I see it, its off-putting, because with a game engine's main website you need to show its strengths straight away, and I think that's something lost in the transition to a new design (you suddenly can't see what AGS can do for you as a developer until you scroll down).
I think a solution to that would be to anchor this...

...To the header, below what's already there. That way the buttons are always accessible without scrolling up, and the "Create Your Own Adventure Games" part will be visible when you load the page, the buttons would instead be like Wikipedia uses them for sections, moving the top of the section to below the header, with the rest above that point.
At first glance, the only other minor criticism I have, is that I feel the Auto-Progress bar in the "Create Your Own Adventure Games" area could be smoothed out a bit, it seems to go fast, and then slow down drastically near the end, whereas that would look more natural to be spread across the entire bar.
I think a solution to that would be to anchor this...

...To the header, below what's already there. That way the buttons are always accessible without scrolling up, and the "Create Your Own Adventure Games" part will be visible when you load the page, the buttons would instead be like Wikipedia uses them for sections, moving the top of the section to below the header, with the rest above that point.
At first glance, the only other minor criticism I have, is that I feel the Auto-Progress bar in the "Create Your Own Adventure Games" area could be smoothed out a bit, it seems to go fast, and then slow down drastically near the end, whereas that would look more natural to be spread across the entire bar.