added more notes and formatting to readme

Author: eshyong

README.md

@@ -12,20 +12,23 @@ How to Write an Emulator (Chip-8 Interpreter) by Laurence Muller
 http://www.multigesture.net/articles/how-to-write-an-emulator-chip-8-interpreter/
 
 Key mapping is based on hexadecimal keypad:
-|1|2|3|C|=>|1|2|3|4|
-|4|5|6|D|=>|Q|W|E|R|
-|7|8|9|E|=>|A|S|D|F|
-|A|0|B|F|=>|Z|X|C|V|
 
-For Tetris:
-4 -> ROTATE
-5 -> LEFT
-6 -> RIGHT
+|1|2|3|C|	=>	|1|2|3|4|
+|4|5|6|D|	=>	|Q|W|E|R|
+|7|8|9|E|	=>	|A|S|D|F|
+|A|0|B|F|	=>	|Z|X|C|V|
+
+Tetris:
+
+4 -> ROTATE
+5 -> LEFT
+6 -> RIGHT
 
 Pong:
-Q -> P1 UP
-1 -> P1 DOWN
-4 -> P2 UP
-R -> P2 DOWN
 
-TODO: change gameplay speed
+Q -> P1 UP
+1 -> P1 DOWN
+4 -> P2 UP
+R -> P2 DOWN
+
+<i>TODO: change gameplay speed to be more playable</i>