Oh definitely the game is being made for the Atari 2600. It mirrors the situation of games that are being developed with the advanced hardware inside of a Harmony Cart. During development for some games you need a Harmony Cart to play and test them but when they're sold as a complete game on it's own cartridge it has everything inside the cart needed to run.
To currently play THIS work-in-progress game on an Atari 2600 from a binary file you need an UnoCart, but when/if this game goes to retail, the cartridge would contain everything that's needed to run. People who buy these games don't necessarily know what's going on inside the cartridge, all they know is that they can plug it into their Atari VCS and it works. :-)
So the game is not made for the Atari2600 at all then?
- Kosmic Stardust likes this