In Tumbler, you play as a shiny black ball and your goal is to navigate the maze. Collect as many green balls as you can in order to gain points and boost up your score. Make sure though to avoid your enemies, the red balls with large spikes on them - run into one of these guys and you'll lose a life, so avoid at all costs! Sometimes you will see power ups appear on screen in the form of a canister that's green and silver - these will get you such temporary advantages as invincibility or slow motion, so any time that you see these pop up, quickly grab them and use their effects to your advantage. Be aware though of their similar looking but not good counterparts, power downs. These look similar, except with red instead of green. These have undesireable effects like speeding up the game or enlarging the character for a period of time - avoid these at all costs, unless you just really like an extra challenge. Watch out for walls too, because bumping into them will also make you lose one of your lives. Laser walls are an even more deadly variant, you'll need to time your movements very carefully around them and keep yourself from hitting the beam. There's also moving walls to be aware of and avoid. Up along the top of the screen, you'll get some vital info displayed: your current time, the best time you've gotten so far, your present score, and your current number of lives. Toggle sound/music on and off by pressing the S key on your keyboard. A fun and addictive game that we highly recommend playing, so long as you're not scared of a bit of a challenge!