Bowl some boulders in the bouncycastle texture - download here if you need it:
http://pcpuzzle.com/forum/viewtopic.php?t=16339
I used Dizzy's idea of one level with signs and one without - good idea hon!

1. When the left z-bot is passing downwards, push the top boulder left and up. The z-bot smashes the barrel. Follow it up and take the coin. Push the boulder down onto the yellow timer and escape left.
2. Push the lower boulder from the starting position left and down. When the z-bot in the upper corridor touches the boulder in that corridor and starts back up, push that boulder up and wait in the corridor with the 2 boulders and barrel. When the z-bot blows that barrel, push the boulder down and right to smash the other barrel. Collect coins.
3. When the kaboom isn’t close, push the boulder in to smash the barrels. 2 cubes remain for the dark blue and the green buttons. Kaboom does red timer.
4. Go up the left alley and up through the yellow TP. Collect the coins and go back up through the TP to inside the fake wall. When the boulder goes down, step right onto the conveyor and right again to push the boulder at the black X right. It lands in the water by the bonus coins (black X).
5. Now to get rid of the boulders. Barrel #1 can get 2 boulders at once. When the moving boulder is moving up to the top, push the barrel left through the TP. It will blow the corner boulder and the moving boulder. Push the box left and barrel #2 up and left. Go up through the TP and push the barrel down to boulder #2 in the bottom left corner. Box goes in water and boulder goes up and left through TP. Go up through TP and push boulder down to smash those 2 boulders.
6. Get the steel box from the fake wall by the ice curve. Push it into the water through the red gate. Watch that gate, it doesn’t stay open. Step through and wait for the boulder bridge to complete. Ride the raft and collect the coins. Go into the right side corridor and push the boulder right. When it bounces back over the trampoline, you jump right and up to land on the coin above the blue sphere. Slide right, which pushes the sphere left. VERY QUICKLY STEP 1 DOWN INTO THE ALCOVE. When the sphere goes through the TP follow it and push the sphere right. Slide round ice curve and push sphere in water. Collect bonus coin and jump down, down, right to push the red sphere right. Step 1 right out of the way of the returning sphere. Collect coins and go through light blue gate. Red sphere is activating yellow timer. Get bonus coins out of fake walls. EXIT.