Honestly, I think it would be complicated. The plugin is set up for about twenty pizza recipes with their ingredients, and the ingredients are layered on top of each other. So, it would be very difficult to modify that.
However, if you have an idea for a chemistry-themed mini-game, I might be able to help you design it—just let me know the concept.
Yes, that could work then. You would just need to replace the ingredients and their images with biological elements, and the recipes with formulas. Just don’t forget two important things: use a large screen to properly display all your elements (1920x1080 is ideal), and make sure you're using the MV version of RPG Maker. If you run into any issues adapting the plugin, I can always help you out.