Of Crates and Creatures - Level 18
The bug would go for the fake crates. You have to prevent this by moving one of the crates a bit closer.
Move the laser to the following position (maybe kill one beetle first):
When the next creature emerges and picks up the crate, move the fake crate into his path, like this:
Now it has to take the longer route back and is killed by the laser. Wait for the next bug to take and explode with the fake crate.
Repeat this for the second crate.