Additions to War of the Mecha

[So I'm messing around with the War of the Mecha rules, a simplified set of rules for playing BattleTech. The original rules fit on one side of a single page and cover the basics. I've come up with some rules for interacting with buildings and here they are. I haven't play-tested them yet, but will soon. Leave me a comment if you beat me to it so I know how they play.]

Patrick’s Additions #1

Buildings

Mecha can move into or onto a building. If the building can support it, a mecha can jump to the roof or climb onto a Level 1 or 2 building. If the building cannot support the mecha, the building collapses and the mecha falls, taking falling damage (1d6 damage per size class of the mecha) plus 1d6 damage per level of the building’s elevation. Mecha can enter the upper levels of buildings from the roofs of adjacent buildings.

Moving into a building causes a Piloting roll, modified by building type and distance moved so far that turn. Exiting a building requires an additional roll. On a successful roll, the mecha takes no damage, but the building take 1d6 damage per size category of the mecha. On a failed roll, the mecha takes damage equal to the buildings current SP, but does not fall.

Building	SP	Supports	MP Cost	Piloting Mod.
Light	15	Light mecha only	2	0
Medium	40	Medium mecha or lighter	3	-1
Heavy	90	Heavy mecha or lighter	4	-2
Hardened	120	Assault mecha or lighter	5	-3
Piloting Roll Mod. For Movement: -1 for 1-4 hexes, -2 for 5-8 hexes, and -3 for 9+ hexes

Buildings may be shot at, providing a +4 bonus for being immobile. Buildings reduced to 0 SP collapse into rubble. Mecha inside a building that collapses takes 1d6 damage per category of the building times the levels of the building above the mecha (so a mecha in the ground floor of an elevation 4 hardened building takes 16d6 damage when it collapses).  Mecha on the roof or an upper floor also suffers falling damage.