WARNING: Expect merge conflicts! This changes a line on nearly every
scene in existence.

However, it clears it all out for the future so we'll never have to deal
with it again.

This prevents hero 1 from permanently setting the objective to one side,
making them very OP and the game un-fun.

Any object with collision mask=2 will no longer collide with the
objective.

I messed up the last commit by not including a file, this fixes that.

Changing the weight of the objective fixes the weird destroy-the-player
physics.

Also, count how long the objective has been tilted to the right or left,
and put counters there. Slow the game down and display who won when the
count exceeds 100% on either side. Like in overwatch, but with tilting.