You ca use "MOUSE" or touch cotrols to chage vehicles.
For 2 player mode, you ca use "A,S,D" ad "J,K,L" keys for shortcuts to chage vehicles.

Shape Transform Race is a fun racing game that can be played in reaction-based 1 and 2 player game modes. You can play the game against bots or against your friend. Always be the fastest by choosing the right vehicle for the terrain! You can unlock new vehicles and characters with the coins you earn from the races.

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