Drag the left mouse butto to move the character's. Please follow i-game tutorial to lear more.
Use left mouse butto to iteract with i-game UI

Embark on an exhilarating climbing adventure in "Hand Over Hand," the ultimate physics-based simulator game! Test your skills as you navigate through challenging levels filled with dynamic obstacles, strategic climbing mechanics, and thrilling ragdoll action. Race to the summit and grab the red flag, but beware of slippery surfaces and tricky terrain that will test your agility and determination.

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