TODO
====

General:
* Highlight tile borders
* Sounds, everywhere
* Remove white buttons / text
* Text widget:
  - numpad keys
  - cursor
* Give a 2 second pause to view the level before starting.
* Use spacebar and pause key as pause keys too
* Don't pause forever while loading unofficial levels
  * For user levels, we can update the cache on level save, but that
    would require a more global cache. Maybe centralise this in
    data.py or somewhere?
  * Or at least display "Loading levels..."

Source:
* README.txt

Levels:
* Tutorial levels
* Reorder levels by difficulty

Level Editor:
* Documentation...
* Download level dialog
* Overlapping OK & Cancel buttons in one of the popups