Game design, programming and art

Nikita Gazarov

Game engine

cocos2d-iphone (MIT license)

Music

Prisoners of the Universe by Arttunetech
Atlantis by Jason Shaw @ audionautix.com (CC license)

Sound effects

From Soundsnap:

From Freesound (CC license):

The sound effects were processed by me to fit the game.

Font

Cuprum by Jovanny Lemonad (OFL license)

Thank you

Maria Tokareva, Marat Bareev, Maria Eltsova
and the Hacker News community