I'm going to admit right now. That one screen with the arrows firing at you that you have to go over twice is the hardest. There just seem like a million things that can go wrong there. It's still a good game. It does annoy me how repetitive it is. There was just no chance for a break.
The music was really nice. The sprite work was great too. It's just impossible for me to love. It's still quite a good concept. For those who are really good at timing, play it!