Think of the Summer Game Festival build as one big SkateBIRD playtest. That means it's super stripped down VS the final game, focused on sandbox play, and we've put a handful of little missions in there to hint at how story mode will work. Also you know, tons of bugs.
It's pretty similar control-wise to the last demo in December, but in a more open level and with a slightly different camera - and we'll leave it intentionally vague past that. We're isolating some specific changes (and not entirely explaining what changed) so we can see how folks respond.