The first half of football was a pretty sad competition between two teams who appeared interested in performing worse than the other. Nothing the Jets did in the first half makes them look like a particularly good football team. Batted balls resulting in touchdowns, fumbles in your own territory. Every advantage the Colts could give the Jets in the first half, they did.
The result is trailing 13-23 going into the half with the chance to kick the ball away to New York to start the second half. If the Colts can securely catch passes, stop fumbling, and in general stop doing things to sabotage themselves, it is entirely possible for a comeback and important road win.