an addicting shooting game, the graphic sprite rendered by 3d, kill any enemies, fill the stock bar and perform upgrades

use mouse to move and shoot

keyboard key:
space - stop movement
special attack
a - spinning bullet
s - node spreader (one node required)
d - spinning node ( four nodes required )
f - random stuff
upgrades
z - speed up
x - auto fire
c - spread shot
v - back shot
b - assist node