Before writing a single line of code, define the of the game. This is a single paragraph that serves as the "litmus test" for every feature. If a feature doesn't directly support this focus, it should be cut or revised.
: Write a brief technical and design description. Game Design: Theory & Practice 2nd Edition
: The specific rules and player inputs (e.g., button presses, movement physics). Before writing a single line of code, define the of the game
: Iterate on the basic feel and spatial layout. Game Design: Theory & Practice 2nd Edition