Kinda lacking...
The original concept, and the simple controls are okay. Not a bad base to build a game on, but I feel it stops being fun pretty quick.
Even at the start I felt like there were enemies appearing that I had zero chance of reaching, which is frustrating. Then the two hit enemies come in, which are in some ways better because if you don't get that second hit you at least get a chance to finish them off on their way up. Though if you don't get even the first hit you're just as screwed.
Worse still, those damn electric buzzers! Even with just one of them playing against the 2nd boss was zero fun. Constantly being punished, even when I haven't made a mistake. Having control taken away over and over just gets annoying. Then when there are three, I would have rage quitted had I not run out of $.
The visuals are great and the game is solid control-wise, it just isn't fun to play.