Press Forward OOOOONNNNN

Have you ever seen an STG where you cannot kill the enemy just by shooting? And you will see now! Different from other STGs, most of the enemies have unlimited HP, which means you cannot hurt them just by shooting. But you can shoot or push them to the top, bottom or right edge to kill them. If they touch the left edge, you will be damaged. Your HP is connected with your energy level, that is to say, when you have much HP, you are powerful. Otherwise, you will be so weak. Hot keys: X: Shoot C: F...