Omega Flowey Simulator is a fan-made Undertale battle game based on the confrontation with Omega Flowey, also known as Photoshop Flowey. Instead of playing through the rest of Undertale, the simulator focuses directly on this boss encounter. The player controls a small human SOUL inside a limited battle area and must survive repeated waves of projectiles, traps, and screen-filling attacks. There is no separate story campaign or exploration section, so the entire experience is built around learning and surviving the fight.

Dodging Is the Main Form of Defense

Movement is more important than attacking. Flowey fills the screen with combinations of bullets, vines, bombs, lasers, and other hazards, forcing the player to constantly reposition the SOUL. Some patterns leave obvious safe spaces, while others require quick reactions to sudden changes. Taking damage reduces health, but healing opportunities can appear during the encounter.

The main gameplay includes:

• controlling the human SOUL with directional movement;
• dodging dense projectile patterns;
• avoiding vines, bombs, lasers, and other hazards;
• surviving several attack phases;
• collecting healing items when available;
• learning repeated patterns after failed attempts;
• reacting to visual distortions and sudden changes;
• retrying the boss battle after defeat.

The Fight Changes Between Phases

Omega Flowey Simulator does not use conventional numbered levels. Instead, the battle is divided into sections with different attack combinations. These phases recreate the chaotic structure of Flowey’s original Neutral Route battle, including sequences connected to the six human SOULs. Surviving long enough moves the encounter forward, while each new section introduces another pattern or changes the way hazards appear on screen.

The Screen Is Part of the Challenge

Visual effects are used heavily throughout the fight. Static, distorted images, abrupt transitions, and changing backgrounds make it harder to focus on the SOUL and incoming attacks. These effects reflect Omega Flowey’s unusual appearance and the deliberately unstable presentation of the original Undertale encounter.

There are no equipment upgrades, character levels, inventories, or permanent abilities. Progress comes entirely from surviving longer and memorizing how different attack patterns behave. Each failed attempt gives the player more information about where hazards appear and how quickly they move, turning repeated attempts into the main progression system.