I know the CSDB site since some years. Don't wonder, nearly all new C64 games were cracked there sometime, it's like back in the 80`s *lol*. Why they do this? I don't know, maybe they want to maintain the classic cracking-culture, which the C64 has, since the 80's?
Because of your question, if some people there could improve your game. There are alot of C64-specialists there, for example graphicians, musicians, programmers, crackers etc. Specialists for nearly everything regarding the C64, so i am sure, that somebody there could improve your game or help you with the game, if you would need help? This announcement, you should make in the forum there then. When you look at the entry of the Serpland-crack there, then you see the point called "Discuss this release". When you are a CSDB-member and you click this point, you can make a new forum-entry and there you can make your announcement. Other members then can read this and answer. Best regards.