Little Knytt is playing outside when he is suddenly abducted by a UFO. It collides with a meteorite and crash lands on an unknown planet. In this freeware platformer, Knytt has to explore the world and collect items needed to repair the ship. There are many creatures, items and events in the background, but most of them cannot be interacted with. Knytt can jump, wall jump and climb straight walls, with no means of attack. An additional key shows a shining beam of light directed to a nearby item and there is another one to show the items collected so far.
The entire game is a single level with different backgrounds for each screen, from underground depths to platform jumping in the clouds. Each screen has tiny details such as small creatures, a building, lights or plants. There are a few creatures that can be dangerous and when nearby Knytt will glow red. White tiles can be used to save progress. The general gameplay focuses on platform and jumping puzzles, while keeping a sense of navigation for the large game world.
There are a few secrets and unlockables in the game, certain locations where Knytt can walk through walls and two hidden power-ups that increase jumping height and speed. Music and sound effects conjure an eerie ambiance, and the general atmosphere reminds of Seiklus and Fumito Ueda's game design.