Ah, okay. I think I know what you mean with the track. I had already fixed it before writing the last post, so I had to play the jam version to see it. By now I was never at the stage of polishing when making a game, except for jam games, but those are small and easy to polish. I have however seen people say that this is the part of the development that takes the longest amount of time, so before I quit the project near the end because of polishing, I just fix every issue I see right away.
Yes, this game will be commercial. It will be a full game, it takes time to make such a thing. But since it will be rather short, it's not going to cost too much. Maybe $5 at max. Really just depends on how long development takes. The problem is that I'm too young to actually have to means to receive the money, so I will have to wait for the release, even if I finish the game before that.