It's Probably A Decompile Mod Of Baldi's Basics.
He Enabled Placeface, Also Called In The Game's Files "TestEnemy", And Then He Cloned Him.
That's What I Think.
No, he didn't. I saw the Assembly-CSharp of the mod and there is the code for the PlaceFaces. So this mod isn't decompiled.
Oh Ok So I Was Wrong
Yeah but it's okay ;)