In Deflectorpool you control a paddle used to bounce balls coming from the top of the screen. Scoring is done by collecting balls of the same color with the round attachment connected to the bat. You can switch colors by holding down the left mouse button and touching any ball of a different color to convert.
The more balls you string up before changing colors, the more points you gain from a higher combo count. Some water will be drained whenever you complete a combo, which is something players have to be good at if they want to prevent the green liquid from overflowing and ending the game.