Two questions

I have two seperate questions.

First, I want to have multiple mc’s (blocks or such) that will move at the same time when I press an arrow key. I’ve tried to apply the same AS to multiple mc’s but only one will move. One time I got all of the to move, but only one would rotate.

Second, is there a way to apply the barrier property to mc’s, such as the blocks and maybe other obstacles like walls, so that when the blocks hit each other or other obstacles they will stop instead of go through them? If so, how? If not, is there another way?