You have 100 blood,you need to kill a certain amount of enemy, escape their collision and bullets!
Behind the gate, you need to kill more enemy, and they will become stronger!
Enter the BOSS levels, kill the BOSS, win!
w,s,d to move forward, j shooting, z closed the background music
BOSS levels, wasd from top to bottom and move around, j shooting forward, h shot back
Of course,you have in the supply of medical kits, good luck to you!