Update README.md

Author: EpicSharpCode

README.md

@@ -1,4 +1,4 @@
-# CockroachPanic
+# CockroachPanic!
 <img src="https://github.com/EpicSharpCode/CockroachPanic/blob/master/Assets/CockroachPanic!/Graphics/Logo.png" width="300" height="150">
 
 <b>Main scene =></b> Assets/CockroachPanic!/Scenes/Main.scene