Advanced Dungeons & Dragons: Heroes of the Lance

The one at the very start, on your right? If so, see the door in the background, there's also one in the foreground as well, enter either of those doors to continue further. Hold up, or down for a moment when near a door, you have to hold it as simply press the button won't work, so press and hold for about, maybe not quite, a second. The controls in this game are kinda odd, also a tad unresponsive, it seems that most people that start playing this game end up never getting passed the first screen, took me more than a few minutes back when I played it the first time to figure out how to enter those doors.