Eye-candy for the birds
Gameplay wise; it's nothing special. But it knows to not be too long, and it has a good score system that encourages you to do a good job without downright punishing you. Music wise; the main theme tune and the death tune is annoying. But the victory and ending tunes are great.
But obviously; the thing that everyone is going to appreciate most here is the art design. Visually; it's total win. The way the characters are designed, the way they're animated, the menu design, ext. Everything works here.
This is a pretty systematic review; but that's because I'm eager to see you make more games and have them be more fun to actually play.