Interestingly, there is absolutely no credit for Gamtec or Chuanpu or Never Ending Team or anything like that in the ROM as far as I can find. Despite the fact that, y'know, it is incredibly obvious that it was developed by at least some of those people. (PC Paint fonts? Check. High Seas Havoc sound engine? Check. Art style reminiscent of Smart Mouse? Yeah, check there as well...)