"Close" kills gain more score and that actually great factor in games like that. Can make game background color different to zombies' color but health and time bar fixed that. Any music and SFX(charge absolutely) can make better the game. A game that has reflex based mechanic and reflect the theme.
A 2D platformer game that has attractive aesthetics and smooth gameplay. Any music and SFX can make better the game. Also if planned difficulty is not decreases of mana, obstacles can make more hard.
