I hit 974 quite a lot ok hit the left oranges box its sat on with the the crate on the left side and place wheels as required
Hi dude 67 place blue barrel far left then clip the orange with the wheel without hitting bomb wheel should go off screen to the right then build shelter with last two items and blue barrel , bomb will Go off when cloud comes but you should survive
Use the blue barrell on the middle (bottom right) orange, just clip it on the left side. This will block the hole and let the orange roll down to the safe place. Use the two wheels to knock the other oranges down to the same place, then block the gap with the final box.
On 75, use the first wheel over on the left hand side down the slope, this will knock the cart to the right and put the orange safe.Use the second wheel to knock the other orange to the right and let it fall to the safe place. The final wheel needs to be dropped onto the cart, then the force of the acid rain will knock it to fill the remaining hole.