readme instructions

Author: codex128

README.md

@@ -1,6 +1,14 @@
 # Forever
 Infinite-runner style game built with JMonkeyEngine 3.
 
+# Instructions
+* Move left/right with the arrow keys or A/D.
+* Jump with space.
+
+# Platform Support
+Linux is supported.<br>
+MacOS and Windows are supposed to work, but are untested.
+
 # Dependencies
 * [JMonkeyEngine 3.5+](https://github.com/jMonkeyEngine/jmonkeyengine)
 * [JmeUtilityLibrary](https://github.com/codex128/JmeUtilityLibrary)