The slippery floor certainly can be a no go for the chickens. And my experience is they prefer lots of fresh air above a rather closed, moistened (poop) and smelly coop.
My rule is to make so much ventilation that the poops dries easily in normal weather and the coop doesn’t smell. Some people are afraid of drafts, I would be more concerned about an unhealthy and darkish coop and sleeping area where parasites can flourish. Chickens often know best where it’s good to sleep. But keep in mind they are not much concerned about safety.
Nice chicks.
The #1 and #2 seem obvious. The blacks #3-4 are not so clear imo and maybe both boys. I would guess the speckled #5 is female. Can you keep one cockerel?
Next steps:
Learning them to roost if they don’t start practicing soon. Approximately 8 weeks is a good moment to start to sleep on a roost bar.
Any ideas what to do if you have more than one cockerel(s).
My rule is to make so much ventilation that the poops dries easily in normal weather and the coop doesn’t smell. Some people are afraid of drafts, I would be more concerned about an unhealthy and darkish coop and sleeping area where parasites can flourish. Chickens often know best where it’s good to sleep. But keep in mind they are not much concerned about safety.
Nice chicks.

The #1 and #2 seem obvious. The blacks #3-4 are not so clear imo and maybe both boys. I would guess the speckled #5 is female. Can you keep one cockerel?
Next steps:
Learning them to roost if they don’t start practicing soon. Approximately 8 weeks is a good moment to start to sleep on a roost bar.
Any ideas what to do if you have more than one cockerel(s).