I'm Sorry involves former (1972-74) Japanese prime minister Kakuei Tanaka trying to collect lots of gold bars in maze-like levels while avoiding enemies primarily based on famous entertainers.
The fact the game was released outside of Japan is surprising, given that it's a satire of Tanaka's involvement in the Lockheed bribery scandals. The title is a play on "sōri", the Japanese word for "prime minister".
Present in the tilemap for the title is a sunset in the background, yet it remains invisible. Also shown is a peak of Mount Fuji.
The logo was changed to a more simple design.
Some of the names on the high score table were changed, possibly from development team members to localization team members.