Portal 1 in Baba is You (Chambers 13-18) 

Download link (Chambers 0-18): drive.google.com/drive/folders/1AG1qgH3FPCG-jbtfhcFJL5Y-SS3AO1eQ?usp=sharing
Video of chambers 0-12: • Portal 1 in Baba is Yo...
General changes made after the last video:
- Made Dot (the thing that makes portals) Auto instead of Move, so you can make a portal while facing a wall instead of it bouncing off.
- Dot becomes Empty when facing a non-portal-able surface instead of bouncing
- Dot also moves faster (in most levels)
- Chamber 9 edited to have emancipation grills
No idea when Chamber 19 will be done, if it ever will.