Watch: YouTube star Mark Rober upgrades his popular backyard squirrel maze

Ready for Round 2 between YouTube star Mark Rober and a pack of hungry squirrels?

The mechanical engineer's latest video features "Backyard Squirrel Maze 2.0," an intense obstacle course built for squirrels as a deterrent to stealing food from a bird feeder.

Rober built the first version of the maze a year ago after noticing squirrels continuing to infiltrate his bird feeders.

The new course includes new wrinkles such as a maze of mini-vents, a "laser" maze that will close one of the exits if tripped, and a wall of bricks that randomly pop in and out. The new maze includes Rober says the maze took about two months of planning.

A former employee at NASA and Apple, Rober rose to fame through his YouTube channel, which boasts more than 18.5 million subscribers. His biggest projects include a "glitter bomb" equipped in fart spray disguised as an Amazon package, to thwart porch pirates.

Follow Brett Molina on Twitter: @brettmolina23.