Plan game scene

I want my game to be in the end really fun and challenging so that the player keeps coming back for more .I want my game not to be just played once and just left but to be played multiple times . The things that excites me with my game is that the game is going to increase in difficulty so its going to be harder for the player to make it trough the game . And because I have never tried to make a game like this before so that excites me already .