Sample portable 2D game implemented with the `simple_2d` API of gamnit

This projects is organized in 3 modules, one per concern:

* `game_logic` defines the pure game logic without any of the display details.

* `asteronits` implements the display logic with support for keyboard input events.

* `touch_ui` adds an interface for touchscreen devices with buttons to open fire and control the ship.

# Art

Artwork created by Kenney.nl under CC0