BIT.TRIP FATE is a pixel rhythm game loosely based off of old-school sidescrolling shooters, in which the player is on a literal rail as the screen scrolls to the right, and is responsible for shooting the enemies before being shot. It is the fifth game in the BIT.TRIP series, and pretty readily the easiest of them all.
Like other BIT.TRIP games, as you string together a number of successful hits without a miss, the game will move to a "higher" mode which has more graphic effects, and as you miss enough without getting an appropriate number of successes, you will move to a "lower" mode, which has fewer. FATE continues the pattern of adding a new mode with each successive game, adding GIGA. In addition to the modes, there is a series of powerups which the player can pick up which will modify their weapon in one of four ways. Additionally, the power-up, when combined with GIGA mode, gets extremely powerful.
Honestly, compared to other BIT.TRIP games, the music has less impact, as it's ultimately up to the player when to take care of enemies instead of being sequenced to the music. It consists of mostly easy levels with more difficult bosses, but it never strays into the "I'm not sure if this is unfair" territory that other BIT.TRIP games can sometimes reach. For someone curious what BIT.TRIP games are all about, this might not be a bad place to start, given it will be more forgiving for new players.