Very cool that you actually interacted with your customer base. Many miss the value of getting direct feedback from their target market. Did you have to get permission to leave flyers at the university classrooms?
We have been in touch with many universities and received great feedback and got offered cool ways to acess the campus. Particularly if you meet a need they are having. But sometimes you should as well not ask too much permission
For Android I can say that we’ve launched 7 games in the last 1 1/2 years and 3 of them reached 100k+ downloads and another 2 500k+ downloads from basically doing nothing. This is not the case on iOS, but having a good icon + screenshots simply works for us on Android. I don’t know if you ever tried it out, but changing your icon sometimes increases or decreases your downloads by up to 50%.