needs improvement
bad points-
takes too much exp to fix the wall
needs better crosshair
airstrike takes a little too long to use.
no story line or plot
good points-
good reload speed
airstike attack
things this game needs-
a shop to buy weapons and hire helpers(repairmen,marksmen,sniper)
various weapon types(rocket launchers,pistols,rifles,SMGs,assualt rifles,etc)
heck,even mines and the ability to strengthen your wall and add more walls
turrets?
anyway this game has potential to be great, you just need to add more stuff and tweak it a little