Hello! Thank you for you feedback, I am glad you enjoyed the game.
The points you make are valid. However, please understand this game has been a side-project for fun more than anything else: an automatic update system would require a server of some sort I guess, at the very least do an online verification each time you boot up the game, with some versioning system... A bit "too much" for the size of this project.
I agree for the music, but I am no musician: I could simply try to find some .mid files of the games' music and throw them in a convertor software such as GXSCC and have them as a 8-bitish tunes, but I am not sure I would have add as many music tracks as I wanted and it would not have sounded very good in my opinion. So I stuck with the original music on this one.
There will probably be no more updates to this game, but let me answer to your other suggestions.
1) A classic cup (like Mario Kart does) is a good idea, but it would have required a lot of searching to find the tracks to keep, and a lot of time to adapt those tracks to the more restricted nature of F-Zero Pocket. After all, I added the last 10 tracks in the 4 days before the release of the game, so I was a bit short on time! ^^
2) A track editor would have been great! I initially planned on having one but this feature got dropped very quickly to ensure I would finish the game in time. I understand the current way is not the easiest one though.
3) Adding more racers would have been fun as well. To tell you the truth, I initially wanted to add the 10 AX drivers as well as Deathborn, Rick Wheeler and a selection of other Nintendo characters (such as Samus Aran) to the list. However, I must say adding as many racers as you suggest is a bit too much work: if I count roughly, that would mean adding at least 20 other characters + original ones.
Once again, thanks for your feedback and your ideas. Overall, I just ran out of time and decided it would be better to release a smaller yet completed game rather than trying to cram more and more content without releasing it.
I had a lot of fun working on that project, so never say never, maybe I will work one day on some features you talked about! Who knows? I just don't see it happening in the near future.
Thanks again!