There is a action called "Save" under the system actions. It will save the game and you have to give it a string like "Save1" or something. Then you simply use the Load function and put your string back in. Just remember to give all the objects you don't want to save the "No Save" behaviour yo reduce the filesize of the save.

There is also a way of saving game information via the Web Storage plugin.

Make an instance variable for the object called something like CurrentLayout and when the object is created set it's CurrentLayout to the layout name. When you click save, save all the objects, but only if their variable CurrentLayout=LayoutName(system exspression)

Even if it was possible, I wouldn't recommend it as performance would not be very good.

I'm glad you figured it out ! I would've responded with more information, but I was using my tiny cell phone, and I really don't like typing on it.

Have an instance variable for team and when players attack eachother make sure their teams are different

Add a condition Is sound tag playing.

Example:

On start of layout play theme song with tag "theme", but with a condition Is sound tag "theme" playing. You will have to invert the condition.

Don't use the system exspretion, but from the object's actions choose spawn another object.

Check if you have preview paralax set to true in the options. It should be false

There should be none. 8 Direction won't collide with tiles it's already overlaping.