This game is platforming at its most basic. The controls are exactly what they need to be for making almost but not quite pixel-perfect jumps, and the graphics, while hardly the best, offer a few well-designed visual backgrounds and are always functional enough to let you recognize what will kill you and what dangers are ahead. The levels are well designed with just enough trickiness to offer potential traps but that the Single Life mode seems (at least to me) very much possible, some day, with enough practice. And the levels are also fun, which I think is the most important part. They are all very memorable in at least one way, and offer a variety of challenges. They are good enough that I feel it is worth playing through the speedrun mode, and playing multiple rounds to attempt to reach A++ scores.
Basically, it is a well-crafted challenge platformer that is beatable by probably most people but also offers enough challenges that people will want to come back to it repeatedly, and is short enough that a full game is not a huge time sink and failing does not prohibit you from coming back and playing again because you felt like you spent too much time on it. I would rank it better than average, and well worth the very low price of entry.