Ernest's UFO Adventure is an action-adventure game by Ernest Chan, officially released on November 1, 2019. The game was initially developed for mobile devices and later adapted into a WebGL version, allowing players to enjoy it without advertisements.

In Ernest's UFO Adventure, players control an alien named Ernest as they navigate a 2D endless runner environment, avoiding hungry ghosts while utilizing arrow keys or on-screen controls for movement. Each round features a randomly selected character from a roster of five unique aliens, adding variety to the gameplay.

The storyline of Ernest's UFO Adventure revolves around Ernest and his alien friends trying to escape from relentless ghosts that threaten to consume them, creating a lighthearted and engaging premise for players.

Ernest's UFO Adventure stands out with its colorful character designs and the absence of advertisements in the WebGL version, providing a seamless gaming experience. The game also features art assets from kenney.nl and music from dl-sounds.com, enhancing its overall appeal.