This is a common push the other person's bot off their side with a twist; the build area is severely limited.
Here are the Rules:
No more than 20 pieces total in any combination of sticks or wheels. For example, 15 sticks and 5 wheels is the limit...
You must build on your side of the pink area.
You must push the other contraption off of their side
You must not connect to or change your opponents contraption
If you allow the opponents contraption to go off your side, you lose.