Cute! My boy has the same crate (did you get yours from Target, too?) and he made the mistake of escaping while I was in the room.
I zipped it to the top and he simply scratched at the zippers until he pulled one down enough to wiggle out. It has 2 zippers so I originally started tying the 2 pulls together. Just a simple ribbon or string through the holes to keep them connected, so he can scratch all he wants but when they move together it doesn't open.
Lately I've just been zipping it to the bottom and no escaping! I'm sure if he tried hard enough he could scratch sideways and open it, but if he manages that I'll just go back to tying the pulls.
Good luck
