@coachtmoore complete missions 1-4 to unlock missions 5-8. complete missions 5-8 to unlock missions 9-12. it's like you have to complete a whole row of missions to unlock another row under it.
i wish the level editor was available in this or the demo, buT IT ISN'T! will i don't care about other's levels, i just want the level making part of it so i can play this like a sandbox game. it's hard to play it like a sandbox in the levels you gave us, so i want custom level maker thing