Apologies in advance for the subtle familiarities in this game. Its actually taken elements from other tabletop games we have made like Astro Command, Galaxy Invader, Astro Wars etc, plus some others not yet made. There's a slight tongue and cheek hint of Flappy Bird if you like that kind of thing. Anyway, its out very soon. Simple to use and it will be free (with ads) - paid version could be out later if people want that. Keep an eye out for "Astro Flaps"!