Are the controls explained somewhere? I figured out that space jumps and c crouches, but there should be a prompt for these buttons (instead of telling the player that they "can jump here").
I agree with elb that the visuals are shaping up greatly. Movement and mouse sensitivity are too floaty, however. The player character should have more weight when hacking enemies with a melee weapon. Having any kind of place holder sound effects would go a long way for adding better game feel and communicating that something happened (such as when you press or step on buttons).