With its monochromatic palette and tinkly music, you might confuse Shapes & Sound for a "chill" game. Not so: it's inspired by the twitchy vector shooters of yore, like Asteroids and Tempest. But while those titles offered no more complexity than a rising difficulty curve, Shapes & Sound combines some simple yet appealing graphics with deep gameplay.
The core of the game is simple: tap around your shape to shoot at those flying towards you. But be selective, because corresponding shapes (of any size) don't hurt you. When you've absorbed enough projectiles, you can unleash a special attack that will usually clear the screen.