It is a very nice educational tool that makes learning entertaining but still by definition it cannot be a game because there is no win or lose state or gameplay loop for that matter. That’s not a bad thing and I am not downplaying it by any means. In fact I don’t think this should be a game it is already great being what it is. An educational tool that makes it more accessible to learn chemistry for a specific group of people who like you said “don’t always connect with traditional methods”. Though I do agree it feels more gamey than most educational tools which is the part of it that I like the most eg. selling your molecules and instantly getting information about them which is both rewarding and useful to learn more about the elements. If you are going to work on this project more in the future I wish you best of luck with it!