* Consider supporting AMX Mouse (or compatibles such as Bryce's USB mouse hardware) and Symbiface 2 Mouse where it makes sense in the game. Movement could also be used for moving to the wanted menu item and clicking the mouse button to select.
* The user should be able to choose the type of monitor. This will enable the game to adjust its colors to either a color monitor or a green / monochrome monitor.
* A game should provide a high score list (if it makes sense) and save it to disc.
* The availability of memory expansions should be investigated. And if additional memory is found the game shall use it in some way. Examples are to add additional features or to load all levels at one at the beginning.