I tested the level with same boots ( 1.5m/s) and an ordinary hero, but with speed ring, no Boss Star. Used also the function moveToXY from Grab coins with moveXY almost as with move boots . So the gold collected results are:
hero.moveXY(coin.pos.x, coin.pos.y)| hero.move(coin.pos)| moveToXY(coin.pos)
55 gold | 63 gold | 65 gold