The fountain of splendiferousness that is Ludum Dare spurts up another mini-gem: spooky platformer Hollow. Retroesque indie platformers are ten a penny, but the vital trick in Connor Ullmann's free browser game, created for Ludum Dare 21, is to make you afraid of the dark. For in it, monsters lurk. Many of these monsters can be defeated, with a consistently joyous flying headbutt move, but that's not the point. You can't quite see where they are and when they're coming for you until they're basically about to eat your tiny, pixel-art, spelunking face.
Therefore, scary. Only a little, but enough, and with a wide range of impressive grotesques lurking in the all-too-near shadows. Beneath the spooks, it's an artful and rapidly fiendish wee platformer in its own right. Play!