Controls :
RIGHT ARROW: MOVE RIGHT
LEFT ARROW: MOVE LEFT
UP ARROW: JUMP
SHIFT: SPRINT/RUN
SPACE: SHOOT
NUM1/1: HAND (NO WEAPON)
NUM2/2: BULLET GUN
NUM3/3 LASER GUN
NUM4/4: ROCKET GUN (PURCHASE ITEM IN SHOP)
NUM5/5: BOMB GUN (PURCHASE ITEM IN SHOP)
NUM6/6: SINGLE BOMB (PURCHASE ITEM IN SHOP)
ESC: PAUSE