This is less of a teaser, and more of just a screenshot, but yes, custom night is confirmed. Like other custom nights, you will be able to edit their difficulty (although this time it's only 0-10), but you will also be able to edit the amount of ventilation you have. I'm going on holiday extremely soon, meaning I will be away from working on the game, so I thought I'd leave you with this, I still have no idea about the game's release date but there's a chance I might make a demo and I'll probably make a trailer at some point as well.