* Sound effects
* Wave sounds
* Standard sounds
* User sounds
* MML sounds
* Numeric sounds (?)
* Game engine features
* Multiple connected objects moving as a unit
* Bizarro world
* Testing the deferred movement
* String data (?)
* A ,PopUp command to use a popup with arguments starting from a mark
* "Goto message" instruction (?)
* Returning a class from COLLIDE/COLLIDEBY to transform
* Editor
* Mouse dragging
* Level index editor
* Bizarro world
* Table of contents for levels
* Can define your own columns
* User can write SQL queries on them
* Deal better with allowing to skip past corrupted levels
* Picture editor/loading
* Allowing more altimages
* Puzzle set catalog format (using with internet; a separate program)
* Inventory/replay hybrid view
* Bookmarks
* Message trace menu to enable/disable
* Bugs
* Figure out why the $SeekerCloser class doesn't seem to work properly
* Level 232 of SUPERHRO puzzle set (the Lava shouldn't expand? why?)
* Display solution comments/timestamp
* VCR mode
* Portable mode, not needing installing files in home directory
* Maybe not needed? You can override the HOME environment variable
* An alternative is to check argv[0]; if it contains / then don't use HOME
* Command-line switch for batch import/export levels
* SQL
* Implement the GROUP column in the CLASSES table