If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The object of the game is to get as far as you can into the mine without crashing.
Try to keep balance as per balance meter press A Key to make arrow go Left and D Key to make arrow go Right. Try to keep it in th middle all the time. In th journey Press Up Arrow key to jump over the Road Blocks.