Terrible. They tried to get too fancy with some elements and they simply do not work. Red light Green light and Ping and Pong simply will not work right.
Fill the hopper with 5 of each F L and Y and some specials of those letters. The F and Y are worth 20 damage and the L 10. Then hammer out words like Fly Flyer Flying Flyby Flyboy Flyover Flypaper Fretfully Fully Fluffy Lullaby Slyly and so on. My average word damage is 55+ usually. Its a cakewalk then.