Push the lowest boulder up then press a yellow button. Then push the boulder you pushed last left then get back onto the highest yellow button. Collect the coin right of Loof and the coin below the coin right of Loof. Get Loof below the second rightest boulder then get Loof left until Loof is above another boulder. Collect the leftest eleven coins with Loof then get Loof right of the rightest boulder. Push the rightest boulder left then collect the remaining coins. Push the highest boulder down then collect the bonus coins.