Thankyou i have finally completed it, seems that everytime i post something i figure it out lol thanks on i go

Just some help where do u put the boxes and boulders at the end in which order can someone help plzzzzzzzzzzz

Thankyou for the tips but just after i posted it i went back to it again and finally figured it out after a week lol new it had to be easy once i did it so on i go

I cant figure out how to get the keys behind the boxes have figured out how to get box to the end and where to put boulders but how to you get those keys ??????????????????