Why, oh why didn't I write out the solution when I made the wretched thing? Do you think I could do it myself this morning?
Anyway, after half and hour of pushing and shoving I finally remembered what I did. I'm sure that like Bobster says there are many ways to do this, but here's my way.
SOLUTION TO LOOF POPS AROUND
1. First walk over all the buttons to smash the boxes in the gates. You are left with one box blocking your way. Go right thru the light blue TP, push the box down, go left thru light blue TP, walk around and push box onto dark blue button. Walk back and go down thru dark blue TP. Push the box up into the gate, come back and push the box down off the button to smash the box in the gate.
2. Go left thru the light blue TP, then left again, which takes you thru the yellow TP. Go on thru the white TP and fetch the cannon from behind the big pyramid. Push it right thru green TP. Get back to the button area (white, then timing it carefully to go right thru yellow). Push the cannon round to smash the box and leave it on the dark blue button.
3. The box generator in the pyramid is now working. Build bridges to the coins north and the bonus coins by pushing 3 boxes down thru green TP, following down and building between the yellow and white TPs for the coins. Build bridge to the coins top left by pushing 2 boxes left thru the white TP, then yellow TP, following left and pushing boxes down into water.
4. You now have 3 boxes left for the 3 buttons. To cover the light blue button push box left thru white and yellow TPs, but don’t follow. Go right thru the yellow TP, up thru the light blue TP and push the box down onto the light blue button. For the yellow button, push box down thru green TP, follow and push the box right thru yellow TP. For the green button push the box down thru green TP, follow and push the box up thru white TP.
5. Gates are now open. Go thru yellow TP, then up thru light blue TP. Exit.