It's not the worst game ever, but it certainly isn't the best. The graphics are bland but fine - white background with black lines, sprite enemies - and the controls are simple enough (although jumping feels a little weird), but there's really nothing special about anything here. The story mode consists of only two short levels, and both levels have the exact same enemies, so there's really no reason to replay once you've finished the game.
Maybe if you spiced up the design with some varied backgrounds, more levels to play, and more enemy types this could be interesting, but as it stands, it's pretty boring.