I love this game! However, I think I got stuck after the 5th mission.
After I killed the last enemy, the cutscene began, but after the cutscene I got the level up message for my character who dealt the final blow, and it wouldn't leave the level.
Perhaps you could change it to where the level up message triggers before the cutscene? Maybe that would fix it.
Otherwise, I had lots of fun playing this game!