File TODO artifact 3dc63d7779 part of check-in 7151612cc3
* Sound effects
* Wave sounds
* Standard sounds
* User sounds
* MML sounds
* Numeric sounds (?)
* Game engine features
* Multiple connected objects moving as a unit
* Bizarro world
* Figure out why the $SeekerCloser class doesn't seem to work properly
* Editor
* Mouse dragging
* Level index editor
* Bizarro world
* Table of contents for levels
* Can define your own columns
* Can do SQL queries on them
* Deal better with allowing to skip past invalid levels