Click and hold on the edge of a line to grab it. Then drop it inside of a green circle to build a platform. Use A and D or the arrow keys to run. You can reset the platform to the gray circles with Shift or Right-Click. Keep moving the platform to get over the spikes and grab the striped white gem at the end of each level. Some levels have an extra challenge where you can collect the green gem, if you can figure out how!

Tip: Get higher bounces off spring ropes by jumping on them multiple times.