I've always hated turret defense games, but I'll try to get over my bias. The game can get boring, since you just make a cone, or a maze around the entrance. 4 for graphics and concept, 2 for execution.
I'll have to go with a 5/5 on this one. The game is *awesome* if you have any brainpower at all. The problem is that brainpower is rare on the internet :<. By the way, I'm thirteen and I enjoy it, so don't believe you can't because of your age.
This is my superefficient, clutter-free, level 1. Actually, I just put some cool effects on the otherwise boring level. Enjoy :D
m,14,0,180,2,rl;m,14,2,270,1,rl;m,14,5,270,2,rl;m,14,8,270,2,rl;m,14,11,270,2,rl;m,14,14,270,2,rl;m,12,14,0,1,rl;m,8,14,0,2,rl;m,3,14,0,3,rl;m,0,14,0,2,rl;m,0,11,90,2,rl;m,1,13,270,1,cjud;m,5,13,270,1,cjud;m,3,13,270,2,cjud;m,1,7,90,3,cjdu;m,5,7,90,3,cjdu;m,3,7,90,2,cjdu;m,4,0,180,3,rl;m,7,0,180,2,rl;m,10,0,180,2,rl;m,11,1,90,2,cjdu;m,13,1,90,2,cjdu;m,11,6,270,1,cjud;m,13,6,270,1,cjud;m,0,8,90,2,rl;m,0,5,90,2,rl;m,7,8,90,3,crroll;m,8,10,0,2,du;m,8,9,0,2,du;m,8,8,0,1,ud;m,13,8,180,2,du;m,13,9,180,1,ud;m,13,10,180,1,ud;m,1,4,0,2,co;m,1,3,0,2,oc;m,1,5,0,2,oc
My answer to VIII: Brimstone
c,3,6;t,3,8;t,11,8;c,11,6;b,6,10;m,7,7,270,2,uodllwwwwwwwwwwcll;m,11,10,90,2,cullddudulwwuodlww;m,3,10,90,2,currddudurorwwwwww;m,7,13,0,3,wwcldorwwwwwwwwwwu;m,2,10,0,3,wwwwwwwwwwwcdowwwu;
This game is great. Anyone know the soundtrack's name?
 "Blueshift"){kind=icon}
 "Frantic 2"){kind=icon}
 "The Great War of Prefectures"){kind=icon}
 "The Last Canopy"){kind=icon}
 "Starland Multiplayer TD"){kind=icon}
 "Zombies!"){kind=icon}
 "Iron Realms"){kind=icon}
 "The Codex of Alchemical Engineering"){kind=icon}
 "Achievement Unlocked"){kind=icon}