Try starting the ball two or three clicks to the left. The ball should travel up the left-hand chute and hopefully will dislodge either the capsule nearest the left wall or the topmost capsule. When the ball is moving fast, send it up the left or right chutes until it’s moving slowly again. Then go after the exposed capsules on the bottom left and bottom right, if you haven’t dislodged them already. From there, carefully clear out the rest of the level.