Typing Turtle

First Release
- Write to Loser, Wes about developing artwork.
- Draw incorrect characters in red.
- Support backspace, backspace to previous lines.
- Scrolling TextView in lesson.
- Missing spaces at the end of some lines thanks to dodgy word wrap.
- Handle ends of line in a sane manner.
- Implement two step types: key learning and text copying.
- Split text into lines for long lessons.
- Try out an insensitive gtk.Entry instead of the gtk.Label.
- Better flow at the end of a level.  Report the result on the Lesson screen: Need more work, Medal received, etc.
- Ability of lessons to list medals in other lessons as prerequisites.  Disable unavailable lessons.
- Some sort of lesson sorting criteria.
+ Split into file-per-screen.
+ Scroll lessons list to the first non-medaled lesson at startup.  Or just remember scroll position.
+ Status message on the main screen.  "You unlocked a new lesson!" for example.  Eventually have the turtle 'say' it.
- Implement a long text copying lesson and fix bugs in the scrolling and typing.
+ Graphical WPM and accuracy meters.
- WPM meter updated in 1sec timer in addition to on keypress.
- Working medals assignment: "You got a medal!" popup, display next to lesson.
- Nice looking keyboard.
- Highlighted keyboard keys when pressed.
- Support for displaying modifier keys in Keyboard.
- Change key shown when modified is held.
- Indicate next key to press on keyboard.
+ Make medal WPM adjustable somehow?  Perhaps a settable Goal WPM?
+ Highlight regions of keyboard, color by finger.
+ Allow lessons to choose between forcing correct keypresses and allowing incorrect ones (with support for Backspace).
+ Artwork and animations.
  + Background picture in main screen.
  + Speed meter picture?
  + Accuracy meter picture?
  + Animated turtle in main screen.
  + Medal pictures: Bronze, Silver, Gold.
  + Icons for remaining keyboard keys.
  + Overlay of correct hand position on keyboard.
+ Sound effects.
  + Welcome to the activity sound.
  + Speed up / slow down sounds when WPM crosses threshold: Slow, Medium, Fast.
  + Medal award sounds for each medal type: None, Bronze, Silver, Gold.  Applause sound.
  + Incorrect key pressed tick sound. 
+ Develop lessons.
  + Continue to develop lessons for all keys on the keyboard.
  - Develop 'focus' lessons e.g. fj.
  - Mark some lessons as "locational" versus "textual" and translate from the English keyboard to native.  Ex: Home row, Left hand, Numbers, etc.
  - Give each lesson criteria for each medal type based on Accuracy, WPM.

Future Release
+ Goal support with progress reporting.  WPM, Accuracy, Entire keyboard learned, etc.
+ Keymap showing skill per key.  Star icons on keys that are mastered.
+ History screen: List of lessons completed with statistics.
+ Progress screen: Line graphs of Accuracy, WPM over time.
+ Lesson editor activity or mode.
+ Automatically generate lessons similar to 'home row' based on a list of keys.

Balloon Game

+ Create BalloonGameScreen class (use gtk.Layout?).
+ Generate a list of random words, or read from lesson dictionary.
+ Score display.
+ Floating balloons with words on them.  Random velocities, "floaty" look.
+ Balloon letters disappear when typed.
+ Balloon pops when word typed, score increased.
+ Rate of balloons increases over time.
+ Game finished popup, displays score and medal text.

Paper Airplane Game

+ Create AirplaneGameScreen class (use gtk.Layout?).
+ Implement bottom-scrolling text display.
+ Airplane toss animation (or maybe takeoff from runway?).  Starts with first letter.
+ Floating airplane momentum based on words per minute.
+ Scrolling background graphics.
+ Finish line graphics.
+ Game finished popup, displays score and medal text.

Race Game

+ Create RaceGameScreen class (use gtk.Layout?).
+ Copy whatever Prakhar's got, finish it up.
+ Game finished popup, displays score and medal text.