--i dont beg for leaving credits but if you will do it im gonna be happy.
for i, v in pairs(workspace.Map.Geometry:GetChildren()) do
    if v.Name == "Part" and v:IsA("Part") or v.Name == "Union" then
        v:Destroy()
    end
end
for i, v in pairs(workspace.Map:GetDescendants()) do
    if v.Name:find("Wall") or v.Name:find("Door") or v.Name:find("Box") or v.Name:find("steps") or v.Name:find("door") or v.Name:find("wall") or v.Name:find("mid") or v.Name:find("Block") or v.Name:find("block") or v.Name:find("Cube") or v.Name:find("cube") or v.Name:find("Part") then
        v:Destroy()
    end
end