As a 2nd year BS Pharmacy, I really find this both informative and enjoying! Take for making this concept into a game, really. You can turn it into a full-blown game with tons of level. I also recommend expanding the roster of vaccines more like the MMR vaccine among others. Thank you because it does inspires me to make a similar game that I want to develop that may help people learn more from what I am learning in my degree! (PS Can I...personally message you so that we could talk for some ideas for future kinds of games? I am planning to start indie development and I want to expand my network, if ever I'll dedicate to this route, really.)