Lutter

Lutter is a game comprised of single screens full of traps, obstacles, enemies and items that the eponymous hero Lutter must navigate in order to find six missing damsels and the enormous monsters that hold them hostage. The game has some element of non-linearity, as there are numerous paths that split off to explore.

The chief goal is to find keys that unlock doors to new areas and eventually to large, screen-sized bosses that Lutter must defeat in shoot 'em up style boss fights. The game also features a few RPG aspects: Lutter has a health bar and can level up, which increases his health and other stats.