Birdiy

Birdiy is an action game developed and released by Mama Top in 1983 only in Japan.

It is the only game produced by the company due to the game underperforming commercially in its native country. According to the game’s arcade brochure, Mama Top had three games under development, but only the first one was released.
The player controls a mother bird named Birdiy that gives birth to a baby bird, whom she has to feed by fetching worms on the leaves and from underground, while having to go near two monster rats to make them go away before one of them eat the baby bird and cause a life loss. Birdiy can also accelerate by pressing the action button, but this can only be performed when moving downwards.

Once Birdiy feeds her baby with every worm on the level, the round is beaten.