1. I agree. This problem happened before and I can't believe that I let his pass on this game! I used "GetAxis" instead of "GetAxisRaw" so the player slide a little. This won't disturbs me, so I didn't notice when I was making the game.
2. I may be wrong, but believe that this was a alternative to the genre. Like Sonic's rings was a alternative from standard energy bar system. Anyway, your opinion was valid.
3. Besides the scenario what BurningOut mentioned (and I replied), and if you aren't too slow, I believe that there no pattern who you can't avoid. For those problems, use the special weapon. The main problem is that these pattern aren't easy to notice from the first play.
Many thanks for the big feedback! I enter in jams for these kinds of reviews!