Step 1: Select a nice mellow song, or use one of the 3 pre-installed ones in Audiosurf

Step 2: Select Pointman Pro (medium difficulty)

Step 3: Begin the song and position bricks on your rack so they don't match. You can do this easily by holding right-click to pick up a brick, left click to drop. When all three rows are full with mis-matched colors, you're ready (little skulls should appear on all the bricks).

Step 4: Simply move to the far left or right lanes (where no blocks appear) and hang out there till a red paint power up appears. Collect it to win the achievement. Note: These power ups are completely random drops, so you may get to the end of the song without even seeing 1.