Elevators in Flashback for ZX Spectrum

Since last video the elevators where added. In Flashback the elevators as well as other objects are controlled by messages posted to them by beacons. Since the beacons are not implemented yet I assigened "go up"/"go down" messages to keys "1" and "2". Not sure the whole elevator thing was worth the effort - adds just one previosly inaccessible room.