If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Use your harpoon to harpoon fish
The strength shows, click the mouse, slide, release more quickly more strength
You can not release the harpoon until the strength reachs 60
The current score shows on the left side, The pass-level score shows on the right side. Come on !
Click the mouse , press it and do not release
Whether you can harpoon the fish , it based on whether your strength is enough.. you can not be added score until the strength is enough
Drag the mouse close to it , release the mouse
The number of harpoon is limited per level !