Arrow Keys, W-A-S-D, Touch Cotrol

Somewhere deep down, a treasure is hidden, but a fishing rod is not enough to reach this treasure. If you want to reach the treasure, you can catch fish and earn money from them. This way, you can improve your fishing rod and reach that treasure. Good luck!

For iOS:
Safari on iOS 8 and later supports WebGL 1.0, and on iOS 15 and later supports WebGL 2.0.

For Android：
Nearly all of them support WebGL