MEGA65 : Swinging platform game mechanic using ONE cycle 32 bit multiplication

I've been experimenting with the Mega65's Maths acceleration registers (it performs 32bit x 32bit multiplication in ONE cycle) to help build a new game mechanic - the swinging platform. I used 8.8 fixed point to hold the angle velocity & acceleration etc. You can see the angle value changing in the debug HUD. It's built from 18 x NCM RRB sprites (16 x 8). Ok, now I need to make it interact with the player. That'll be for the next post.