Roblox is like Blockland accept you have tools for building, you're places are always dedicated, and you have diffrent servers for you're places. Here's picture of a place below.
Also you do not add behaviors with events, You add behaviors by scripting.
Have you ever heard of Powder Game? Here's link. http://dan-ball.jp/en/javagame/dust/ but you NEED to install the latest version of Java for it to work.
Here's pic
The picture is for no people saying No pix no clix
Guys stfu, people, this game rules now people, no more bad comments and, stfu!