MoonLess is a vintage-styled side scrolling platform game that takes place on the moon. You play as Hank, an astronaut who is caught in the middle of an alien attack on his last day of work. Your mission is to help Hank reach the emergency escape vehicle named LESS (Lunar EScape Systems) while fighting off hordes of enemies and avoiding tricky obstacles.

The game is challenging and requires you to keep track of your oxygen levels, ammunition, and space suit. Hank's weapon can be charged for a more powerful beam or upgraded to a double shot with limited ammunition by picking up a special power up. Limited grenade power ups are also available as a special attack to fend off larger hordes of enemies. An oxygen meter provides a time limit before Hank struggles with hypoxia, and should be renewed by picking up extra tanks along the way. Finally, Hank's movement is greatly enhanced by his attached jetpack that automatically recharges when idle, allowing the player to reach higher platforms or evade enemies.

With its vintage-style graphics and soundtrack produced exclusively for the game by Synt5, MoonLess is a must-play for those who enjoy challenging side scrolling platform games.