Arrow Keys to move X to shoot (hold to charge) Z to jump (hold to fly)
I changed some things. Credit to Capcom for the Mega Man 10 music. Credit to Slam Dunc Studios for Hybrid. Credit to SEGA for Opa-Opa. Credit to @nivock for the boss AI. UPDATE 1.1: gave Hybrid soul more health to make the boss fight longer and more difficult. UPDATE 1.2: changed the color of his second sprite and fixed a bug where you play the game before the health reaches 250.