it's a shame that the levels are strictly horizontal, makes the game an auto runner in nature, which isn't a bad thing, but suggests a control scheme where you don't have to press Forward all the time, like a speed switch between slow and fast. the only time where you need to go backwards is to retry a jump, not to explore the area.
i really like the feel of this game, it's a lot like Super Mario Land 1, except the two-color style makes the image more legible.