Add README for distribution

README_DISTRIB.md

@@ -0,0 +1,41 @@
+# Junk
+
+Thanks for downloading Junk! If you're a tinkerer, the source code for Junk is available on Github: https://github.com/y2bd/junk
+
+# Keymap
+
+By default, Junk uses the following control scheme
+
+**Left**: Move left  
+**Right**: Move right  
+**Up**: Hard drop  
+**Down**: Soft drop  
+**Z**: Rotate counterclockwise  
+**X**: Rotate clockwise  
+
+If you wish to change the control scheme
+
+1. Play the game at least once
+2. Navigate to the application data folder for Junk
+   1. If you're on Windows, this is usually located at `%APPDATA%\Junk`, or `%APPDATA%\LOVE\Junk` if running from source
+   2. If you're on MacOS or Linux, find the paths here: https://love2d.org/wiki/love.filesystem
+3. Open up `keymap.data`` in your text editor. If it doesn't exist, make sure you've run the game at least once.
+
+`keymap.data` is sorted in the following order:
+
+```
+move-left,move-right,hard-drop,soft-drop,rotate-ccw,rotate-cw
+```
+
+To change the keymap, swap the default values with new values according to LOVE's KeyConstants table: https://love2d.org/wiki/KeyConstant. Here are some example keymappings:
+
+```
+-- standard keymapping
+left,right,up,down,z,x
+
+-- left-handed keymapping
+a,d,w,s,j,k
+
+-- up-to-rotate keymapping
+left,right,space,down,z,up
+```