IMPOSSIBLE SO FAR. Somehow I messed up in the code and none of the enemy's get damaged. Dang. GAME REQUIRES AND KNUCKLES MODE IF ITS GONNA BE POSSIBLE Update - 0.1 : Fixed the damage for bosses. But shadow glitches out. Update - 0.2 : The shadow glitch can be pulled off with the space button being pressed a few times.
Credit to Red_Reborn and TheSpritersResource