Instructions are in the project. Space to type. Hold F to see typeable messages. This is a Cloud Chat Engine. It uses pre-written messages and cloud variables to communicate with other Scratchers. This chat is super easy to add to your game considering that it is only 1 sprite. The Cloud Variables may overload once you get over 20 messages at one time so make sure to reset chat every once in a while by setting "Chat", the cloud variable, to nothing. Again, this is a very strict engine as to how far you can go with it because of Scratch Rules.
All Scripts are by me. Right now you can only add 9 allowed messages for users to say at a time, but I will come out with a new version that will allow more.