Aleksey Volkov has Twins Snakes (iTunes Link) in the iTunes App Store for FREE (normally $1.99) for a limited time. Deal expires March 5, 2010.

Original puzzle game. Snake eats the berries and grows up more and more. But all is not so simple as it seems – he has a crazy brother. You are controling the cute little green snake, who absorbs berries scattered everywhere on the playing field, grows more and more, filling his body as a result almost the entire screen. His crazy brother does the opposite. For eaten berries you get points. Creep, eat and grow, but the main thing – do not eat your tail and each other in the end!