The downside of the game is not the simplicity of mechanics, quite the opposite.
Look for literature on how to add challenges in your gameplay, eg:
https://gamedevelopment.tutsplus.com/tutorials/making-difficult-fun-how-to-chall...
The downside of the game is not the simplicity of mechanics, quite the opposite.
Look for literature on how to add challenges in your gameplay, eg:
https://gamedevelopment.tutsplus.com/tutorials/making-difficult-fun-how-to-chall...