Warlock Bentspine is a 2D platformer that features four stages to beat, each with a set of randomized stages for you to play in whichever direction you decide to tackle a level. At the start of a game you're presented with exits on the left and right side of the room, and if you keep going in one direction you'll face the boss of that stage in the tenth room.
Similar to the Megaman series, players will gain a new weapon to use once they've beaten a stage boss. Besides being able to shoot horizontally and vertically, Mr. Bentspine can also execute double jumps and dash for a short distance.
One thing to note is that the game doesn't automatically save your progress, although a three-digit combination code will be shown at the stage selection menu. This code can be used at the title screen to restore a game from a certain state.