BLNS from Abyss

Hostile cyborg balloons are bursting out of an underground vertical tunnel in the middle of the city. You control a drone with a lightning generator to destroy these creatures. Go down the tunnel, straight into the abyss, to find the source of the invasion.

Touch the screen with two fingers and lightning will appear between them. Pop the balloons with this lightning. Collect dropped coins to upgrade your weapon, battery, and unlock new equipment models. Destroy waves of various enemies and their bosses.