The gameplay of Greenish Realm is based on quick reactions, precision, and constant movement. The player's main objective is to aim and hit the target, eliminating as many enemies as possible within a limited time. Each match lasts 45 seconds, so the player must act quickly, accurately, and without pausing to achieve the highest score before time runs out.

At the start of each round, enemies appear on the screen, becoming the player's primary targets. To eliminate them, the player must aim and shoot. The faster the player reacts and hits the target, the more enemies they will eliminate in a round. The game focuses on shooting accuracy and quick decision-making in short sessions.

The 45-second timer creates a constant sense of tension and dynamism. The player has no time for long pauses or reflection, as every second impacts the final result. This keeps the game action-packed from beginning to end. The more enemies eliminated within the allotted time, the higher the player's final score. Greenish Realm has a simple and straightforward premise: aim, shoot, and destroy the target. Short sessions make the gameplay easy and dynamic, and the desire to improve your score motivates you to start new rounds again and again. The main focus is on reaction speed, shooting accuracy, and the number of enemies destroyed in a single game session.