If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
In the future, Earth must protect itself from alien invaders, a task handled by the Science Special Search Party. However, they are not alone in this endeavor. After crashing his ship on Earth while in pursuit of the evil alien Bemular, the super-being Ultraman is here to help whenever the attacking aliens prove too much for humanity alone to handle. Standing hundreds of feet tall with incredible strength and amazing abilities, he can only remain on Earth for a few minutes, and so must defeat his foes before his power drains completely.
ASZXDC + enter and right-shift. D and C are for the side buttons.