Cthildha is a game that puts story above everything else. It only takes 5-7 minutes to experience everything the game has to offer, so I hope you'll stick it out to the end!
These are explained more or less in the game, but here you go.
Arrow keys, WASD - Tap to move (don't hold down the buttons)
1 - Pay 10 spark to create a small planet.
2 - Pay 200 spark to create a medium planet.
3 - Pay 3,000 spark to create a large planet.
Use the spark to create planets. The planets spawn more spark. Fun creative cycle.
I hope you enjoy that 38 Quadrillion possibilities of randomly generated planets in this game!