Oh! I assumed it would appear when the mouse cursor had y... 70 or something.
The problem with having GUI appear at y=3 is that if the player never moves the cursor that high, they won't find the interface. I remember that when I first played KQ5, the first adventure game I played, I spent a long time just walking around from screen to screen because I had no idea where to look for the GUI, and it never occured to me to hover the mouse over the top of the screen.
Now, most AGS players are used to having to mouse over the top of the screen to check if there's anything there. But since there already IS a visible GUI on top of the screen, why would we assume that there is more above it?
If you hide away the GUI that well, make sure that you have some kind of hint that it's actually there. For instance, have the GUI slide down every time a new item is added to the inventory (heck, you could even go fancy and animate the inventory object materializing inside the green beam or something if you want to).
The problem with having GUI appear at y=3 is that if the player never moves the cursor that high, they won't find the interface. I remember that when I first played KQ5, the first adventure game I played, I spent a long time just walking around from screen to screen because I had no idea where to look for the GUI, and it never occured to me to hover the mouse over the top of the screen.
Now, most AGS players are used to having to mouse over the top of the screen to check if there's anything there. But since there already IS a visible GUI on top of the screen, why would we assume that there is more above it?
If you hide away the GUI that well, make sure that you have some kind of hint that it's actually there. For instance, have the GUI slide down every time a new item is added to the inventory (heck, you could even go fancy and animate the inventory object materializing inside the green beam or something if you want to).