[WIP] Mine to the sky

[Koh]

Looks pretty good so far. One thing I want to suggest, based on the screenshot with the floor spikes, is to make it so that once you've taken damage from them and fallen into them, or walk into spikes from the side, you don't take any further damage. LaMulana did this when they remade the original, and it worked out fantastic. It makes more logical sense as well, since the only deadly portion of a spike is the tip.