Interview a gamer and ask him what he likes to see in a new game / go to one of your gamer friend's houses and observe him while he plays the game , even play with him , and ask hi why or what he enjoys about the game . Then make your game according to what he says . If his favourite is doom 3 , dont drop dead on the floor , its just the graphics and old classical music played in reverse that makes it good . But if you look at the game's concept , or the game's design theory of it , its simply
" hit the monster and run " . Think about it .
In DBP - 3D is easier than 2D , 2 player is easier than Single player , Dont you think life rocks .. ?