Yume Kōjō: Doki Doki Panic is a 1987 Japanese video game released for the Family Computer Disk System about a family who plans to rescue two children. “Doki doki” is a Japanese onomatopoeia for a quickly-beating heart, and it is commonly found in Japanese video game titles, carrying connotations of excitement and anxiety.
[Source: ultimatepopculture.fandom.com]