Juno First (Unlicensed)

Juno First presents a set number of enemies per level, but they do not make a gallery formation like Galaga or Space Invaders. Instead, the player's ship can move forward and backward (in addition to left and right) to hunt enemies in an orientation that is vertical, but has some horizon-oriented tilt. This style of gameplay would be re-used in a later Konami shooter, Axelay.