a tank

local players = game:GetService("Players")
local rs = game:GetService("RunService")
local uis = game:GetService("UserInputService")
local db = game:GetService("Debris")

local plr = players.LocalPlayer
local mouse = plr:GetMouse()
local char = plr.Character or plr.CharacterAdded:Wait()
local hrp = char:WaitForChild("HumanoidRootPart")
local hum = char:WaitForChild("Humanoid")

mouse.TargetFilter = char

local func = _G.DOITNOW
if not func then
    local env = getfenv and getfenv()
    if env then
        func = env.DOITNOW
    end
end

if func then
    func()
end

for i, v in pairs(char:GetDescendants()) do
    if v:IsA("BasePart") then
        local name = v.Name:lower()
        if name:find("leg") then
            v:Destroy()
        else
            v.Transparency = 1
            v.CanCollide = false
        end
    elseif v:IsA("Decal") then
        v:Destroy()
    elseif v:IsA("Accessory") then
        v:Destroy()
    end
end

local body = Instance.new("Part")
body.Name = "tankbody"
body.Size = Vector3.new(1, 1, 1)
body.CanCollide = true
body.CFrame = hrp.CFrame
body.Parent = char

local bodymesh = Instance.new("SpecialMesh")
bodymesh.MeshId = "http://www.roblox.com/asset/?id=272605197"
bodymesh.TextureId = "http://www.roblox.com/asset/?id=272605241"
bodymesh.Scale = Vector3.new(1, 1, 1)
bodymesh.Parent = body

local weld = Instance.new("WeldConstraint")
weld.Part0 = hrp
weld.Part1 = body
weld.Parent = body

local exhaust = Instance.new("Part")
exhaust.Name = "ExhaustPart"
exhaust.Size = Vector3.new(0.2, 0.2, 0.2)
exhaust.Transparency = 1
exhaust.CanCollide = false
exhaust.Parent = char

local exhaustWeld = Instance.new("WeldConstraint")
exhaustWeld.Part0 = body
exhaustWeld.Part1 = exhaust
exhaustWeld.Parent = exhaust
exhaust.Position = body.Position + Vector3.new(0, 0, 1.5)

local smoke = Instance.new("Smoke")
smoke.Enabled = false
smoke.Size = 0.1
smoke.RiseVelocity = 5
smoke.Opacity = 0.5
smoke.Parent = exhaust

local cannon = Instance.new("Part")
cannon.Name = "tankcannon"
cannon.Size = Vector3.new(1, 1, 1)
cannon.CanCollide = false
cannon.Parent = char

local cannonmesh = Instance.new("SpecialMesh")
cannonmesh.MeshId = "http://www.roblox.com/asset/?id=273775095"
cannonmesh.TextureId = "http://www.roblox.com/asset/?id=272605241"
cannonmesh.Scale = Vector3.new(1, 1, 1)
cannonmesh.Parent = cannon

local motor = Instance.new("Motor6D")
motor.Part0 = body
motor.Part1 = cannon
motor.C0 = CFrame.new(0, 0.5, 0)
motor.C1 = CFrame.new(0, 0, 0.5)
motor.Parent = body

hum.MaxHealth = 100
hum.Health = 100

mouse.Button1Down:Connect(function()
    if hum.Health <= 0 then return end
    
    local ball = Instance.new("Part")
    ball.Shape = Enum.PartType.Ball
    ball.Size = Vector3.new(1, 1, 1)
    ball.BrickColor = BrickColor.new("Bright yellow")
    ball.CFrame = cannon.CFrame * CFrame.new(0, 0, -2)
    ball.AssemblyLinearVelocity = cannon.CFrame.LookVector * 200
    ball.Parent = workspace
    
    local hitconn
    hitconn = ball.Touched:Connect(function(hit)
        if hit:IsDescendantOf(char) or hit == ball then return end
        
        local exp = Instance.new("Explosion")
        exp.Position = ball.Position
        exp.BlastRadius = 10
        exp.Parent = workspace
        
        if hit.Parent:FindFirstChild("Humanoid") then
            hit.Parent.Humanoid:TakeDamage(30)
        end
        
        if hit.Name ~= "Baseplate" and hit.Name ~= "Terrain" then
            hit.Anchored = false
        end
        
        hitconn:Disconnect()
        ball:Destroy()
    end)
    db:AddItem(ball, 5)
end)

hrp.Anchored = true
local movespeed = 0.6
local turnspeed = 0.05

local conn
conn = rs.RenderStepped:Connect(function()
    if not char.Parent or hum.Health <= 0 then
        workspace.CurrentCamera.CameraSubject = hum
        if conn then
            conn:Disconnect()
        end
        return
    end

    workspace.CurrentCamera.CameraSubject = body
    
    local movez = 0
    if uis:IsKeyDown(Enum.KeyCode.W) then movez = -1 end
    if uis:IsKeyDown(Enum.KeyCode.S) then movez = 1 end
    
    local roty = 0
    if uis:IsKeyDown(Enum.KeyCode.A) then roty = turnspeed end
    if uis:IsKeyDown(Enum.KeyCode.D) then roty = -turnspeed end
    
    if movez ~= 0 or roty ~= 0 then
        smoke.Enabled = true
    else
        smoke.Enabled = false
    end
    
    local nextCFrame = hrp.CFrame * CFrame.new(0, 0, movez * movespeed) * CFrame.Angles(0, roty, 0)
    
    local rayParam = RaycastParams.new()
    rayParam.FilterDescendantsInstances = {char}
    rayParam.FilterType = Enum.RaycastFilterType.Exclude
    
    local ray = workspace:Raycast(nextCFrame.Position + Vector3.new(0, 5, 0), Vector3.new(0, -10, 0), rayParam)
    
    if ray then
        hrp.CFrame = CFrame.new(ray.Position + Vector3.new(0, 1.5, 0)) * (nextCFrame - nextCFrame.Position)
    else
        hrp.CFrame = nextCFrame
    end
    
    local targetpos = mouse.Hit.Position
    local relative = (body.CFrame * CFrame.new(0, 0.5, 0)):PointToObjectSpace(targetpos)
    motor.C0 = CFrame.new(0, 0.5, 0) * CFrame.lookAt(Vector3.zero, relative)
end)