How a sentence becomes a Game Boy ROM

You start with a sentence. It can be a character, a place, and one thing the player does. A sketch is optional. The sentence is the brief, and the sketch is a reference for the look. Neither of them is the game yet.

The build turns that brief into C and compiles it with GBDK. GBDK is the toolkit that knows the original Game Boy: where the program sits, how a memory bank is switched, and how the picture hardware is called. When the compile finishes, the output is a .gb file. That file is the ROM. It is the whole program.

A build that stops before the ROM is ready does not count as one of your games. The page lists what the finished game covers. If a piece of the sentence is missing, ask for it as one edit. One change at a time stays closer to the request than pasting the whole brief again.

The screen the ROM draws into is 160 by 144 pixels, in four shades. A sentence that asks for a painted sunset still becomes tiles of 8 by 8. The Game Boy never displays the sketch. It displays those tiles.

Pro includes 4 new games in a calendar month after the trial, and the trial itself includes 2. The ROM you get plays in the browser on the game page, and the same file is the one you download.