Are there any graphics in the works? It's fun to click around with as-is, but would be a much better learning tool if one could see the sugar chains be broken down etc. Maybe a flash or spark when a phosphate group is removed from an ATP molecule...
That's actually a pretty feasible suggestion! I can't spend too much more time on it because of my education and because the main functionality of the app is finished, but the visualization of the release of energy sounds doable. Ideas on how to do it with pure Javascript/HTML/CSS?