Leaderstat change:
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 leaderstats
getfield -1 StatName
pushnumber 999999999
setfield -2 Value
emptystack

Gravity:
getglobal workspace
pushnumber 50
setfield -2 Gravity
emptystack

Bubble chat (not standard):
getglobal game
getfield -1 GetService
pushvalue -2
pushstring Players
pcall 2 1 0
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Head
getglobal game
getfield -1 Chat
getfield -1 Chat
pushvalue -2
pushvalue -5
pushstring Your message goes here!
pushstring Green
pcall 4 0 0
emptystack

Hipheight:
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Humanoid
pushnumber 3.5
setfield -2 HipHeight
pcall 1 0 0
settop 0

Kill (yourself?):
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Torso
getfield -1 Destroy
pushvalue -2
pcall 1 0 0
emptystack

Forcefield:
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getglobal Instance
getfield -1 new
pushstring ForceField
pushvalue -4
pcall 2 0 0
emptystack

Building Tools (btools):
getglobal game
getfield -1 GetService
pushvalue -2
pushstring Players
pcall 2 1 0
getfield -1 LocalPlayer
getfield -1 Backpack
getglobal Instance
getfield -1 new
pushstring HopperBin
pushvalue -4
pcall 2 1 0
pushnumber 2
setfield -2 BinType
emptystack
getglobal game
getfield -1 GetService
pushvalue -2
pushstring Players
pcall 2 1 0
getfield -1 LocalPlayer
getfield -1 Backpack
getglobal Instance
getfield -1 new
pushstring HopperBin
pushvalue -4
pcall 2 1 0
pushnumber 3
setfield -2 BinType
emptystack
getglobal game
getfield -1 GetService
pushvalue -2
pushstring Players
pcall 2 1 0
getfield -1 LocalPlayer
getfield -1 Backpack
getglobal Instance
getfield -1 new
pushstring HopperBin
pushvalue -4
pcall 2 1 0
pushnumber 4
setfield -2 BinType
emptystack

Music!:
getglobal workspace
getglobal Instance
getfield -1 new
pushstring Sound
pushvalue -4
pcall 2 1 0
pushstring rbxassetid://(whtver)
setfield -2 SoundId
pushnumber 99
setfield -2 Volume
getfield -1 Play
pushvalue -2
pcall 1 0 0
emptystack

Duck:
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Left Arm
getfield -1 Destroy
pushvalue -2
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Right Arm
getfield -1 Destroy
pushvalue -2
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Right Leg
pushnumber 1
setfield -2 Transparency
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Left Leg
pushnumber 1
setfield -2 Transparency
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Head
pushnumber 1
setfield -2 Transparency
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Head
getfield -1 face
pushnumber 1
setfield -2 Transparency
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Torso
getglobal Instance
getfield -1 new
pushstring SpecialMesh
pushvalue -4
pcall 2 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Torso
getfield -1 Mesh
pushstring rbxassetid://9419831
setfield -2 MeshId
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Torso
getfield -1 Mesh
pushstring rbxassetid://9419827
setfield -2 TextureId
pcall 1 0 0
settop 0
getglobal game
getfield -1 Players
getfield -1 LocalPlayer
getfield -1 Character
getfield -1 Torso
getfield -1 Mesh
getglobal Vector3
getfield -1 new
pushnumber 6
pushnumber 6
pushnumber 6
pcall 3 1 0
setfield -3 Scale
settop 0