Symbian-games-dragon-bird-320x240 !!exclusive!!
Side-scrolling games require a horizontal preview window. The 320-pixel width gave players vital milliseconds to react to incoming enemy birds, magical projectiles, or cavern walls.
Why 320x240?
Bosses, particularly the Fire Dragon, often have shields that must be breached before you can land a killing blow. Symbian-games-dragon-bird-320x240