Time-waster title screen added, NPC numbers fixed

Only computer scientists count from 0, guys. NPCs now numbered from
1.

Added a super time-waster title screen, but every little helps. I need
to regroup and figure out what needs to be _really_ done next, but
yeah.

Also fixed a series of embarrassing instances where I was referring to
the old constants in Game and not Constants. Should have deleted all the
constants from Game when I copied them in to Constants, but no. Well,
it's sorted now, hooray!