! WIP - Half-fixes for two-tile slopes.

GOAL: Fix 2-tile slopes.

* STATES weren't responding correctly for 2-TILE-SLOPES
fix: changed state handling to convert floats to ints

* 2-TILE-SLOPES collisions cause ENTITY to LEVITATE
fix: swapped a and b around in room

* LEVITATED over the left-SLOPE tile.
fix: states now check for the slope points instead of the rect points

! ENTITY clips into the GAP between 2-SLOPE TILES
x/y tile selection doesn't check for the right tile