If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Use your keyboard to direct Sonny-the-chihuahua through the city maze. Avoid the dog-catcher who will take one of his lives. If Sonny eats a japalenno he can put the chomp on the dogcatchers by walking over them. Biting a dogcatcher will send them packing back to the pound. Clear the city of all food to move on to the next level.