Geometry Dash Level 17 is known as Blast Processing. It's the fourth level in the Harder mode. You have to navigate around all obstacles and listen to some great tunes.
Instructions
After entering the dual portal, you may be able to get the remaining currency (52%), by passing through the third large diamond. After you have passed the second obstacle in your face, move toward the ground to reach the "mouth" of third obstacle. This will allow you to claim your coin (69%). There are several more cubes with spike-like icicles at the bottom that act as obstacles. However, the third one contains fake spikes. To retrieve the coin (86%), keep low and slide beneath the block.
