Crashing green blocks will make you grow while crashing red blocks will make you shrink. Sometimes a special yellow boxes will appear to give special powers such as a speed up or a shield that grants immunity to spikes and saws and shrinking. Slide your finger across the screen to move and avoid hitting the saws or get too small. You may choose to watch a rewarded video ad (if available) in order to get x3 extra lives (one useable per game) which can be used for a second chance to reach higher scores. You must maintain a decent size in order to fit through the obstacles and still have the chance to collect higher points! How long can you keep it up?!