Just cruise. The rider carves on their own. Drag your finger to shift their weight: left/right onto an edge, down onto the tail, then release for an ollie. All tricks are listed top right under “Tricks ?”.
Keyboard: arrows / WASD, space = ollie

Tricks

On the ground
drag left / right	Carve. Deep and long: your hand drags through the snow (Eurocarve)
quick counter-drag	Slash: a wall of snow
hold down / up	Tail Press / Nose Press
press + sideways	Butter (180, 360 …)
release a press	Ollie / Nollie
In the air
swipe sideways	Spin: frontside / backside 180, 360, 540 …
swipe up / down	Frontflip / Backflip
hold finger	Grab, depending on where: top left Melon (longer: Method), top centre Nose, top right Mute, bottom left Stalefish, bottom centre Tail, bottom right Indy
Keyboard	Arrows / WASD, space ollie, 1–6 grabs

Tap to close. You always land: the rider spins out cleanly on their own.