Had a grin on my face playing this, even in it's very early stages I can see massive potential! Even without sound the axe swings seemed visceral. I started to get vibes from old wave combat games such as Painkiller, Duke Nukem and Doom. So this game is in solid company.
Keep going! Consider reducing the environment textures and foliage to medium, or even low levels of detail, as the player won't be seeing them as they charge into combat! Ensure your map is blocked off correctly (I love the towering, otherworldly mountain cliffs!)
Adding some proper gritty audio to this will do wonders! Excellent beginnings, and I can't wait to see what you can do going forward! Well done :)