1. Right now there is no defined parameters for breeding. Just make sure you have enough space and food for them. The developers have said that they plan to change the breeding system as the current one is temporary.
2. Moss will be changed in later updated to be less annoying. along with seeds and other things. Also I believe they plan on adding attachments to rafts to prevent moss.
3. Weapons are current a work in progress and will also be updated. The same goes for armor.
4.Hammocks must be placed between two trees. You can press R to rotate the hammock if it won't appear. You need a space between the two trees as well. same goes for the Drying Rack
5. To change the focus on a floor you should press "tab". You always need to build the ladder first.
Also, to make using multiple floors easier there are several view modes. Press F10 to switch floor view mode.
There are four modes:
- Show all floors
- Show current floor only
- Show higher floors(including current floor)
- Show lower floors(including current floor).
If you need anything else feel free to ask.