I've altered glowston so that it no longer gives speed, only 'power'- bigger explosions, that kind of thing. Sugar now gives speed; this avoids having 9x speed, which glitches out. Speed does not give extra damage in most cases.

(Arrows still need to be fixed; speed makes them hit harder, but glowstone does nothing for now)

I've also nerfed the spawn snowballs so they have a 1 second cooldown. This means multiplier snowballs do not create a giant horde, but can create a few creatures over time.