My inspiration came from playing with alloy warheads, I could not stop output when I hit boss, and I had to keep jumping to avoid attack. It was too difficult. I thought that if I had a battery to output, I would feel comfortable to hide from the skills. The core gameplay of the game is the elements of horizontal shooting plus tower defense. Mainly after killing monsters by shooting, collecting resources, then using resources to release skills, and some skills can build defense towers. The game story is also very interesting, and there are daily life with the heroine….