If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Pitaya—Power fruit,give you strength to kill enimies and push wood box. Banana—Air fruit, you can jump higher when eating it. Watermelon—Water fruit,give you ability to dive through the sea and stand on the cloud.
Find the part of map in treasure box in each level to unlock the next level.