So are you planning to have the bad guys catch up faster than the current demo when her legs aren't bound? As in the current demo, other than the RNG (I assume it's RNG) causing a deluge of obstacles near the end, I don't see the need for such a power up.
Though on that note, it seems that sometimes the large dumpsters spawn in such a way that looks like you can get between them and the wall, but the gap is too narrow. So when I try and get between, I get stuck. Could just be me being dumb, but maybe something to consider having them spawn either right next to the wall, or far enough away you can go between them and the wall.
And that made me think of another thing. Perhaps (might make the game more complex than desired), but perhaps if her arms aren't bound, she can climb over the dumpsters at a significant delay? I would perfectly understand if the dumpsters were always going to be a wall you have to go around no matter what, it just made me wonder if there were any plans for bound arms to impact the gameplay or if it were going to be purely cosmetic.