Minecraft Arcade V0.9a!

This is called v0.9a and not V0.9 is because features are still going to be implemented, and V1 is coming soon, so I want to get some of the features in, but not rushing, easing.
In V0.9a, I implemented one of @Eden264’s Idea about having 4 items in the toolbar and not 3, so I implemented it, and changed how Minecraft Arcade identifies blocks, so that way we can use more of it. Now, the last toolbar will be a sword, from @Eden264, which was really nice, and It should be coming soon.