Your normal and there's not much else to say, learn to speed through levels and stay at a consistent speed, jump only at the right moment and you'll be pro soon.

You are a regular user. You may or may not have contributed to the Central, but in no means are you a nuisance. You could say you don't stand out of the crowd, but that's just okay.

Nothing stands in the way of getting your hack featured if you put enough time and heart into it, you likely are able to apply all kinds of hacks to your hack, including dynamic sprites and the like and I wouldn't be surprised if you even could code a good amount by yourself.