This game is near perfect to me. Its infinitely replayable, enjoyable and promotes creativity.
The stages are all nearly great and are fun and challenging no matter what weapon you use and even rewards you for usage of them.
The bosses are fun to fight as you do almost a dance of sorts as you battle them trying your hardest to get higher and higher ranks.
Playing this game over and over again to try to reach an axiom when I was younger was a great time and I still replay the game every now and then.