Update README with some thoughts on the gameplay

README.md

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+Typy!
+======
+
+Typy is a pygame-based typing game planned out and conceived by
+ET and myself (she's big on typing games).
+
+
+The plan
+---------
+The concept is fairly simple, using stories (i.e. nursery rhymes) 
+words will scroll from right to left at variable rates of speed 
+(depending on the level) and the player must type the words as they
+appear on the screen. 
+
+When the player types the correct word and hits "space",
+just as if they were writing the story themselves one of two things
+will happen:
+
+  * **Correct**: Player receives a number of *coins* based on the length of the word and its difficulty
+  * **Wrong**: *Coins* are detracted from the player's coin purse
+
+At the end of a round (or story) the player will visit the **store**,
+where they can purchase "tools". These tools can then be used in the next
+round of play, allowing the player to advance further or get themselves out
+of tight jams. Tools will be invoked by the user hitting "enter" which will
+slow the speed of the words and give the player a few seconds to type in the
+name of the tool that they would like to use, i.e. for the "ice" tool the player
+would have to type in i-c-e to enable the tool. 
+
+If the user accumulates a large amount of coins, they can buy more interesting tools
+or more interesting stories as they start to collect more and more coins
+
+
+Unanswered Questions
+---------------------
+
+  * Can/should the player be able to fetch/scrape stories from a site or copy/paste them into a dialog to "play" with that story?
+  * How to gauge "difficulty" of a particular word
+  * High-scores sharing?
+  * Saving player's coins between invocations of the game?
+