This is a fairly solid Platformer that's just the right length.  I'd most liken it to Bucky O'Hare for the NES, since you do have a lifebar, and it feels kind of similar.  There are a variety of different weapons to pick up, though unfortunately, you lose them once you get hit.  Music keeps you going, and visuals are pretty good; something like NES+.  Level design is mostly good, though it gets frustrating toward the end with enemy placement or a few auto-scrolling stages; there are no checkpoints, but fortunately, you have infinite lives, and stages are pretty short.  Bosses are their own stage, and they have some bite to them, especially since you'll be using your default weapon unless you beat them your first try, but they're surmountable.