Bikkuri Mouse¹⁾—perhaps the Sony PlayStation 2's first mouse compatible release—is a drawing game by UrumaDelvi, and 岩井俊雄 (Toshio Iwai). UrumaDelvi also contributed to Iwai's simtunes.

Bikkuri Mouse is a drawing game probably aimed at children. The player can select from twelve colours, different brushes, and different drawing modes. Certain colour and shape combinations act as macros. For example: a yellow circle may produce a sun. It allows for two players to draw on the same stage.

• What is UrumaDelvi? - The 'about' section on their official, English, website.
• Bikkuri Mouse - Youtube video.
• Commercial 1 | Commercial 2 - Two Japanese television ads., on Youtube.
• PS2 Bikkuri Mouse Update - Game preview, at Gamespot.
• Bikkuri Mouse on The Cutting Room Floor wiki.