You play as the character "Endog" defending your treehouse base from enemy attacks. Aim, shoot, and defeat enemies. Earn as much experience as possible, level up your character, and experience new, more powerful weapons as you level up. Discover secret rewards when you reach the highest level.

This game features:
- 4 difficulty levels: practice, easy, normal, and hard
- 7 different weapons with a total of 14 reload animations accompanied by satisfying sound effects
- 5 customization sections (character appearance, weaponry, controls, crosshair, reload wheel)
- 5 adjustable gameplay options: music volume, sound effect (SFX) volume, camera shake intensity, vibration duration, FPS counter

Customization Section:
*** Character Appearance ***
Change the color of your character and accessories. There is a feature to swap or copy colors between character and accessory colors.

*** Weaponry ***
View all weapons you have acquired along with their statistics. Determine which weapon to use for the "showcase" in the main menu. Change the appearance of the muzzle flash and the projectile trail.

*** Controls ***
Adjust the layout and appearance of the control buttons. Adjust the position, size, and color (including transparency) of the control buttons, including the previous weapon, next weapon, reload, and pause buttons.

*** Crosshair ***
Change the appearance of the crosshair by adjusting the line length, line thickness, and line color. Additional features include rotation, 45-degree tilt, and dynamic crosshair settings.

*** Reload Wheel ***
Change the progress color, background color, and border color of the reload wheel. You can copy and paste colors between reload wheel components.

In-Game Mechanics:
** Responsive Fire and Reload Actuation **
Player input to fire or reload will be executed very quickly.

** Weapon Recoil **
Weapons generate recoil after firing a bullet. The more frequently fired, the greater the recoil. The amount of recoil can affect the intensity of camera shake and the dynamic factors of the crosshair.

** Cartridge Ejection **
Each time a weapon is fired, it ejects an empty cartridge, and its movement involves the game engine's physics.

** Two Reload Variants **
There are two reload variants: full reload and partial reload. A full reload reloads the weapon when ammunition is depleted, while a partial reload reloads the weapon when ammunition is still low. Animations and sound effects may vary depending on the reload type and the weapon used.