Pretty cool game! It does seem like there is not much reason to stay on one level if you have seen the exit already, so you can just run past everything. You could try to add more allies, but the controls are not really precise enough to recruit enemies consistently without taking damage in the process. That and your allies often go on a suicide mission.
The procedurally generated levels are really nice, never had any issues except enemies spawning next to you. Well done in a week time! Really cool game, and even more if polished up!