So I just bought early-access to this game and it is actually quite fun.
When you start the game you are introduced to one of the new modes called Waveboard where you essentially surf on your music and then when you see a chance to jump, you do so to get big air time and do air combos for points.
If you play the Waveboard Grid mode you get to pick up bricks for points like the old game. Except they work as a multiplier for your jumps instead.
I made a little video to show it off. The song in this video is from the game itself as I didn't have any songs on my computer (damn you Spotify). You can also link your account to Soundcloud and stream music from those you follow directly to the game. Let me know what you think of the video.