The objective for each single-screen level is to maneuver your stick-figure ninja to unlock the exit and escape. The controls are pure platformer in their simplicity. Left thumbstick or D-pad controls movement, A button jumps. The longer you hold A the higher the jump. Simple right? Not so fast. Mid-air flight can be directed and all movement is affected by inertia. Gravity sucks and physics is an unforgiving bitch. Hit the ground too hard? Dead. Hit the ceiling too hard? Dead. Wall-slide into a bomb? Yup, dead.
The least of your concerns is the time limit, extended by collecting gold pieces. Targeting lasers, static lasers, homing missiles, bombs, electricity traps, robots, and enemy ninja all exist for one reason. To watch you die in an explosion of pixely goodness.