BIT.TRIP BEAT is the first of the BIT.TRIP games, a rhythm game in which you play as the left paddle attempting to prevent any pixels from passing you, loosely based off Pong. The pixels (hereafter referred to as "beats") travel from the right side of the screen to the left, in time with the music. Some behave uniquely depending on their color, and the player's score increases depending on how many beats in a row they are able to hit. Once you've hit a certain number without having missed a certain number, you'll move into a higher "mode" which has flashier graphics and higher scoring. Similarly, once you've missed a certain number without having hit a certain number, you'll go to a lower "mode" with more plain graphics, eventually losing altogether.
It's an excellent game, but can be rather difficult at times - there are no checkpoints mid-song, so much of the game relies upon memorization of patterns, and being able to anticipate what is coming up next via the music. That being said, there is a visceral pleasure at completing a particularly difficult part sufficiently to allow you to proceed further in the level - if you enjoy rhythm games, this is one of the best and should not be missed.