Well I've managed to submit something ...
The controls are clunky, but work for the mist part, didn't get to SFX, has a Start Screen instead of a menu, no options, enemies don't fully work as intended, and not had a chance to test the ending yet, but I'm out of time and it does play ...
Main experiments were music system and dialogue system, which pretty much work as desired, but could use refinement in future.
So it's already a successful exercise.
Good luck everyone!