That's impressive that you have that much narration in the project in such a short time.

I thought it was still on some really long intro cutscene or cinematic sequence, and I was going to possibly note that the cutscene might have been way too long especially when showing just the exact same background the whole time.

It's a great looking background scene, and the narration is excellent but it may only be able to work like that for so long especially with the same exact visual.

After checking the comments, I realize the game was supposed to start during the narration, you were already able to move.

You were supposed to, from what I can gather, not do much except run around during the narration, but nothing else really.

However I may want to go with my impression before checking the comments, as maybe it's more accurate:

What I think is it's not very clear that it wasn't actually an intro cutscene, something about the way it's shown.

I think to improve the game, there should be something changed where it's very clear if it's a cutscene, or the game at the same time with narration.

In my personal opinion, suppose this were the full game and it had more after this. The problem may not be that you have nothing more than running. The real problem may actually be if you add anything else after adding more than running, but still leave this part (and maybe parts throughout the game) potentially confusing in this same way - even after adding everything else, including additional elements like this one. 

I think you shouldn't leave it like this or have too many elements like this because they may be confusing what they are (unless they are tweaked to be clearer somehow, with very clear indications of it's a cutscene, if it's the game, or both).

I don't know exactly what this improvement looks like for your game to make it less confusing in this aspect. 

It may be as simple as keeping a static text with no narration that just says the controls to move. 

Once you start moving, or maybe a few seconds afterwards then the narration starts right away as you are moving.

(however, the moving may have to be more obvious than it is now, of which the way it is now may also be contributing to it still potentially being confusing. It looks like someone is dying in the background rather than the player being able to assume they are actually able to move, much less run, while dying. And I am not sure putting up literal movement controls on screen, then narrating after they move really works for this idea, that's a really oversimplified example, I think you should try something better than that instead. Since it may still be confusing that there's narration while you move, too, which may still continue to introduce the possibility to confuse it for a cutscene)

I think it's tricky to get right. You seem to be trying to go for a really original feel here, so the exact way to get it right may be different than some over-simplified suggestion like the above.

Other than this detail above, I actually really liked this game. 

It really got me thinking about a lot of things, and your narration is excellent, the story is really great, it was a thought provoking experience, so very nice job on this!

Wow, a very cool and spooky tone. I really like the sound design, though I would agree with @Ollie1700 that the levels are a bit off.

The silhouetted character with the visceral particle effect looks so cool, and I love the frantic feeling from the camera angle and run animation.

I really like the shaders you used on the ground/sky that gave it that animated paper aesthetic. Super cool looking.

Is there more to the gameplay than just running towards the horizon and looking around at the scenery while listening to the narration? If not that's fine, does a great job of capturing the story of Grendel's flight regardless, just wanted to make sure I'm not missing anything.