Looks ok, but try to put less 1 x 1 x5 bricks and more others, it looks better that way.
The only reason i use the one stud brick is because if you hold numpad-enter and one of the numpad building directions you start a build streak where its like speed racer and you can lay a wall down in 10 seconds.
You don't rush your builds, take some time and select a different block.
Protip: Make walls at least seven studs tall and don't make them spammy.
Use good weapons. Not those, whose script is stolen and the models are awful.