If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The goal of Addit Blitz! it to create as many combos of 10 as possible. Select the colored blocks to add them to one another, once you reach 10 you'll score points and be ready to try and get the high score. Bonus points are awarded for how fast and how frequent you cause a match as well as the color types you use.
This game is played with mouse only.