That was the launch of my mun flyby spacecraft. I did indeed launch in the wrong direction, but turns out I got a free return trajectory(I didn't have flight planning, so that was by chance). I launched it in a fuel-inefficient trajectory(you can see that my velocity vector is 45 degrees even though I'm at 50 km), so I had about 1.2 liquid fuel and oxidizer left in the spacecraft after the flyby:)