I want to recreate a flash game that I really love to play. I just want to use the concept of the game. I will not copy its graphic or its music. This is possible right? As I've seen many people copying minecraft on the apple store, also recently popular games like flappybird and 2048.
So as long as I do not copy their codings, graphics, music, etc… I'm fine to use the concept, right? I will be making my own images, adding extra features, my own character, a different title and fonts.