Aim, then drop an egg (or a small owl) into the nest. When two of the same touch, they grow into the next owl:
Merges in quick succession make a chain and score extra. Two Moon Owls together fly off to the moon for a big bonus.
Don't let the nest overflow: if an owl stays above the dashed line for two seconds, the nest is full.
Mouse: move to aim, click to drop.
Touch: drag to aim, lift your finger to drop.
Keys: Left/Right or A/D aim, Space or Down drops, P or Esc pauses, M mutes.