Michelle doesn't mind if I post this so here's a walkthrough for the beginning, to say timing is important is the understatement of the century!
-pick up the coin on the red timer first
-tramp right and push top box left, stay on the timer!
-tramp down and push the box up onto the timer
-tramp right again and push that box back over onto the tramp and follow it, quick, quick, quick!
-one box should now be in the water and one on the timer
-here we go again

tramp right go up and push the timer box all the way down to the teal gate
-go back up to the timer, when it's safe and tramp down and push the boxes onto the teal and blue buttons
-go down and get the coin above the water hole
-tramp up grab the coin above the timer and go back and push the box down and into the water
See how easy it is, and you thought it was tricky!
I'll post a screenshot to help you!