Nice game.
Visually it could use some work... a lot of work. its col yo added in some sound effects.
My greatest issue is this, the enemies are way too high and the player character is way too close to the ground. the walls have this effect on the eyes and it would be much better if the walls were just made of the normal default cubes in the engine you use.
also, a map would be a great addition to your game in future even though, i have seen some games pull off the no Map gameplay, if thats more your style then the game has to be pretty heavy on the level layout and design style.
i think your game can turn out to be something really cool. i'm looking forward to seeing much better Demo version of your game
Best of Luck!