Battle, by 
Another first level, I keep wondering where all those people come from…
Gameplay
As you said yourself the top half of the level has large open spaces. This makes the level very empty. Try to make some more over there. The bottom part is a bit better, although the tunnel on the far left is a bit too long and the (secret) tunnel on the right side which is connected to the surface is quite useless unless you use RF climbing to get up. This level isn’t bad for a first level, I hope you will improve by not making the same mistakes again.
Eyecandy
There are no notable mistakes in the eyecandy, but you should have decorated it some more because it looks rather boring now. Your background is ok and original but there could have been some more. This level also lacks foreground.
Originality
Well, you’ve put a shield in your level. Most people dont like shields, as they are overpowered. This level lacks interesting things and also things to do, which makes it quite boring. I wouldn’t host this online,(if I could) look at other levels and see what makes them so nice.
Gameplay: 4
Eyecandy: 4.5
Originality: 4
Final grade: 4.2