Lol yeah that was pretty rough. It took me a while to figure out how to get past it.
If you're on the top level, look around for one of those red wheel/cranks that raises a gate.
The antlions kept pushing me away from the wheel when I was trying to turn it, and that was a little frustrating.
There's a car on the bottom level that you push into one of the spawning holes. Then go up a ramp, on the 2nd level there's a car also. On the 3rd level up, there's also a car (but it's behind a gate, just raise the gate first). Just blast those cars down below and plug the other holes, then you should be fine.