岡本吉起
The game took two years to develop, with a production budget of and four megabytes of sprite data. The game started off as a regular side-scrolling shooter, but Yoshiki Okamoto wanted a more imaginative game. During development, Capcom tried to make the game easier to play, having received criticism about how hard it was to dodge enemy projectiles in previous games. As this was the first game to use the CPS-1, Capcom tried to fully maximize its software capabilities. The game did not generate enough income upon its release due to large numbers of shooter games in the market and there were increased expenses due to a shortage of chips needed for the CPS-1 boards.