Hey! I didn't know about vector!
Platformer was the 1 control method I had not tried (it contains "Vector" movement).
To clarify, in case anyone is looking for similar "dodge"-type movement, this appears to be working for me:
1. Apply Platform behavior to Player sprite (adjust behavior attributes as desired)
Keyboard / On A pressed
/ Player / Set Platform vector X to -5000 (e.g.)
/ System / Wait 1 second
/ Player / Set Platform vector X to 5000
Player dodges (slides smoothly) left, pauses for 1 second, then returns.
Now I need to figure out how to take away player control during the dodge.