If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Help Ninjai retrieve the Budokai Scroll and defeat all the enemies that will block your way. This game is quite hard to play and very tricky to use but once you get the hand of it things will run smoothly.
Jump against the trees upwards in a zig zag way. So that you can go through the game because there places that you can't pass if you don't go upward.