Zunou 4989

Zunou 4989 is a puzzle game, somewhat akin to Sokoban, where the player is a space ship collecting flags before reaching the exit. To prevent you from performing this task, a homing missile appears not long after you enter the area, taking one step per each of your steps. To further complicate matters, the missile creates clouds of smoke in its wake which causes you to wait a turn, while whenever you get a flag the missile has to wait a turn.