Rainmaker

The player controls the actions of a diligent little celestial child, sitting on his mobile (pointer-controlled) cloud up in the sky with a giant mallet in his hand. His job is to wash off dirty pigeons flying beneath his cloud by pounding the cloud (clicking the mouse or tapping the touch-screen) at the appropriate time and turning them into doves. But look out! The cloud doesn't provide much protection, and he can only sustain three bird-touches until the game ends.

Typical for such productions, an invulnerability power-up periodically floats up from the ground, and bonus points are awarded for cleaning multiple pigeons with the same shower-spritz.