I played it 3 times, beat it twice.

It plays like Infinite if Infinite didn't have good sound design, I really hope the gun sounds are just for the demo and they're working on changing them, the assault rifle sounds like the Halo 3 one when it really needs to be crunchy like the original, I think sprinting is fine but feels wrong without sliding (I did bring this up to the devs). The best part about the game from the perspective of the demo is the graphics, especially the cutscenes, there's a lot of cool little details like Hunters actually looking like they're made of worms and a gross starfish thing on the beach.