You have 3 Yetis to work with. You lose a Yeti by staying „Out of bounds“ for more than 3 seconds.
Hit pengus in-air to get score points. Try to get more than one per jump. This will multiply the value.
You can make use of „Out of bounds“ space to gain speed or try to return after jumps that landed outside.
The game ends if all 3 Yetis are lost or the wave reached its minimum size.