Ok,
I was asked to enter https://hackaday.io/contest/18215-the-1kb-challenge with 1K hires games.
According to the rules I must count used ROM, routines and tables to the used memory.
With this rule I must count 265 bytes for used routines from the display in the ROM and reading keyboard.
Added to this also the 8 bytes per letter in the table of the ROM.
With this in mind only 1 game can enter the competition: Hunt the Wumpus.
This game is short in code, uses a large screen and only 2 letters.