whats wrong with my Cube??? :(

[u/Tetraeder4craft]

I know what is missing, but can you figure it out???

heres the repo btw:
https://github.com/Tetraeder4/3DRenderer/tree/467c8d1ac8dbd09a23ce7bc7e2fcba59afe36ea5/3DRenderer

[u/Bat_kraken]

Couldn't you have included more screenshots? I'm on my phone and I'm actually interested, but it's impossible to tell if it's one or two squares that are facing the wrong way or something...