If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Megaman 2 is a platform and action game like its predecessor, Mega Man. The player controls Mega Man as he traverses eight stages to defeat the bosses, Dr. Wily's Robot Masters: Metal Man, Air Man, Bubble Man, Quick Man, Crash Man, Flash Man, Heat Man, and Wood Man.
Arrow keys to move.
Z - Shoot.
X - Jump.