If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Pets don't come equipped with rockets for a reason: They'd just fly around going to the bathroom all over the place. Thankfully, the Rocket Pets are blasting off through a galaxy far, far away from you. These flying furballs are on a quest for coins. Unlock power-ups, upgrade your gear and rocket your way across the universe.
Mouse or Spacebar to use rocket.