Spunky’s Dangerous Day is a puzzle-platform game similar to Lemmings (1991), Mario & Wario (1993) and The Lost Vikings (1993). There are four areas, each with four levels: a beach, a junkyard, a backyard, and a laundromat. In each section, Spunky gets distracted by objects such as mops, frisbees, and ice cream vendors and goes after them without any awareness of the hazards around him; the player acts as Rocko manipulating parts of the level environment to safely guide Spunky to a golden fire hydrant.
In the first level, for example, Rocko uses rafts to transport Spunky across water, jumps on lawn chairs and pulley system knobs to get Spunky to higher platforms, and protects Spunky from crabs and sea gulls. Difficulty modes include easy and hard. On easy, the player can pan through the entire stage when the game is paused, a feature not present on hard. Rocko can jump, duck, punch, perform a quick succession of kicks, swipe his tail at enemies, and pick up objects; he can also change Spunky’s walking direction by picking him up.
Along the way, the player collects power-ups for Spunky and Rocko to utilize. For Spunky, there are food items that increase Spunky’s health, a balloon that inflates Spunky for Rocko to kick him all over the level, bones that temporarily halt Spunky, shields that make Spunky invincible for a period of time, chili peppers that speed him up, green grunge that slows him down, and extra lives.
For Rocko, there are short-term invincibility shields as well as lighting that temporarily increases his speed and springs that make him jump higher. Some items are in areas too small for Rocko to enter, meaning Spunky has to obtain them. In addition to golden fire hydrants to end the level, progress is tracked by Spunky collecting fire hydrants as checkpoints, as well as passwords at the end of every 4th section.