Honestly, it has far to go. Depends on if your goal is to one day make a commercially sellable game or not. If you do then it needs to be good. And there are lots of good genre games that have been successful out there, to get ideas from. Look into all of the online write ups on what makes a game addictive and what age group to target and so on.
If you need ideas you can fake it by doing what other successful games do, just make sure all of the graphics etc, are original.