Assembly times are slow, making the cartridge challenging to use for larger programs. In the manual, Atari recommended the Assembler Editor as a tool for writing subroutines to speed up Atari BASIC, which would be much smaller than full applications. The Atari Macro Assembler was offered as an alternative with better performance and more features, such as macros, but it was disk-based, copy-protected, and did not include an editor or debugger. Despite the recommendation, commercial software was written using the Assembler Editor, such as the games "Eastern Front (1941)", "Caverns of Mars", "Galahad and the Holy Grail", and "Kid Grid".