Duality (itch) (RedCrown)

Made for the GMTK Game Jam, the theme is Dual Purpose Design. A space shooter with a one-button system developed for mobile, fend of endless waves of enemies to defend Earth, while managing your shield and energy.

Almost every mechanic has more than one function, resulting in-split second decision making as you adjust to randomly generated waves of increasing difficulty. Earth will provide you with upgrades, but be warned that one undefended good hit will end you and set you back to a fresh ship.