Developer: No Code Studios
Platforms: IOS Universal, Android
There's almost something refreshing about those pure and simple games like Super Hexagon or Canabalt or any other of those simple-to-control, laser-focused, arcade-y experiences. Super Arc Light is another entry to that list, a radial shmup that only requires a single finger to control but focus and timing to succeed.
Shooting those encroaching waves is easy as well. Your turret automatically travels around the base's circular entrance; holding down slows time and fires your weapons, while letting go causes you to reverse direction and rotate the opposite way. It may take a few attempts before you get a handle on the one-touch control scheme, but when you do, combat becomes a hectic back-and-forth dance as you swing back and forth to deal with enemies on one side, spinning around to take out a new pattern, then back again to grab a power-up.
iOS and Android.