Level 34 hints?
I get to the bottom, but run out before clearing the last boxes
Me too, I try and save the bombs, but it never works out, or there are little rodents in the way, which means the blast isn't close enough to the final crates to actually blast them clear. So I wind up using the blender, which only does one bit of the crate... I'm pretty sure it'll come down to complete luck in the end - much like the previous couple of challenges...
Save your last blender blast for the bottom box.