Gonner is a procedurally-generated 2D platformer that blends action and roguelike mechanics. Players control Ikk, a determined character on a quest to find a special trinket for his friend, Sally, a giant whale. The game features a unique art style and a variety of environments that change with each playthrough. With Death as a mentor, Ikk gains diverse abilities and weapons to navigate through perilous landscapes filled with hostile creatures.

The gameplay is designed to be challenging, with numerous difficult bosses and hidden secrets that enhance the overall experience. Players can expect multiple endings, which add replay value. Gonner's fast-paced action and engaging storyline, combined with its artistic design, create a memorable gaming experience for those who enjoy a tough challenge.