Hi Garry,

Looking at the game’s source code, I was intrigued by your curious Fill function in the pen object (fountain pen). But that’s not the main point: while the potential filling of the pen is supported, its emptying is not. What’s interesting is that, in this case, the PunyInform library responds “The fountain pen is already empty”, whereas the standard library responds “The fountain pen can’t hold anything”. In both cases, this is not satisfactory for your pen.
I’ve reported the issue to PunyInform.

Regarding your curious Fill function, this might have been simpler:

    Fill:
        if (second == nothing) {
            if (TestScope(ink_bottle))
                print "(with the ink from the ink bottle";
            else if ((TestScope(water) || TestScope(bubbler))
                print "(with the water from the bubbler";
            else if (TestScope(pool))
                print "(with the water from the swimming pool";
            else
                "You'll have to tell me what to fill it with.";
            print ")^";
        }
        else if (second ~= ink_bottle or water or pool or bubbler)
            "You can't fill the fountain pen with ", (ThatOrThose)second, ".";
        "The fountain pen is already full of ink.";

(Edit)

This was an excellent adventure and worthy winner for this competition. The writing is good and the scenario tightly focused so that the player is rarely in any doubt what they need to do next to keep exploring. The protagonist Ian, a rebellious teenager, does have to break some rules along the way to solve the mystery which seems entirely in keeping with his personality. Beginners may need the odd hint to solve the puzzles. The hint system (which worked around the geography of the school) was excellent and helped me to get back on track when I occasionally got stuck for a few minutes. I liked the NPCs too who had a little personality each but also provided a clear function in the game to move the puzzles forward. I won't say anything more for fear of spoilers, but suffice to say that this is a school with some hidden learning pathways!  Congratulations to the author.