If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Pony Fly in a Fantasy Land is a game of reflexes in which you have to keep your little pony in the air as long as possible. When you click/touch the screen, your pony will jump. You need to make it go through holes in walls. If you’re not accurate enough and your pony hit a surface, you lose.