Extract Archive in you Counter-Strike 2D folder.
When you launch server, open More Settings and see, that mp_luaserver is server.lua, if another, please change it in server.lua.

Guide:
Firstly mod give you a "Physic gun", its claw, to use it do easy attack(mouse1). Well, done.
Press F2 - to open "Context Menu". Where you found Walls, Other, Floor, Objects, Weapons, NPC, Car, Tools, Undo Prop
Walls: In standart mod 16 walls, where 3 walls - is glass(barricade)
Other: In standart mod 8 floor walls.

Floor: In standart mod 23 floors.

Objects: In standart mod 3 bushes and 2 trees.

Weapons: This menu, that can spawn 63 weapons/items.

NPC: This menu spawn 5 game npc:Zombie, Headcrab, Snark, Vortigaunt, Soldier.

Car: This menu spawn 20 "simple code" cars.

Tools: This menu change mode of "Tool gun" (five-seven). This have Size tool and Remover Tool(Remove props(all, that created by Context Menu), floor items, entity remover(npc,buildings))
Warning: Size tool works normaly, if you click in prop and it don't change size, use gravity gun to replace it.

Undo Prop may cause problems, it remove latest prop.
Tips:
If player spawn, his money "grow" in 50$ per ms100.
You can found "secret menu"(see on screen), where you can found Wall Defender and Invisible(Not fully, for fun)

F-Keys:
Mod have 2 types F-Keys: If you drag prop and if not(1 and 2).
1 Type: F2 - Rotate prop, F3 - Remove prop, F4 - Dublicate prop.
2 Type: F2 - Opens menu, F3 - Noclip at cursor, F4 - move image, like deathruns.

Thats All!

Do not modify mod, without my permission.
Do not say that it mod yours.
Please, be good man.

Use function addb.
addb(xx,yy,ii,mm,bb,rr,lk,nt)
Arguments
xx - prop x (no tile)
yy - prop y (no tile)
ii - prop image
mm - mode of image(ID + 101, 200, etc.)
bb - Building as base(All, without Barricade, Barbed wire, Gate Field, have bullet shield.
rr - prop rotate(use 0,90,180,270 or 45,135,225,315)
lk - prop owner(use 0, if it not player building. 1-32)
nt - base speed(automatic car, base 1-100, 101 - closed door, 102 - opened door)