Cat Watch is a 2D arcade shooter minigame with roguelike progression where you control a cat defending an apartment against enemies that seek cover and strike at the right moment. Jump, attack, and eliminate waves of mosquitoes, rats, and bats as you advance toward the source of the infestation. During the night, strange creatures begin invading the building through the ventilation system. As the resident cat, you must patrol each apartment, eliminate the intruders, and keep the chaos under control. These enemies analyze the environment, seek cover, try to surround you, and attack when they find an opportunity. Each cleared wave pushes you higher up the building, where new enemies, tougher encounters, and greater pressure await. Survive long enough to uncover the source of the infestation.