If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Ratchet Head is a chill robot dude with a ratchet for a head, or inside its head, maybe? This means of course that Ratchet Head can totes defeat that inter-dimensional tyrant KING SPACE, so let's make it happen.
Arrow Keys to move.
Z to shoot.
X to jump.