I tried replicating that "Barrier" that would force the characters to bounce in the opposite direction upon collision. However, even after following all of the steps exactly (Character -> Advanced Move: Forced Switch Button, Checked -2 X value, 1 Y Value, Multiply, Collision, Timeout: 0.001) I still couldn't replicate the same effect. Did I miss a step? Does the gravity have to be adjusted? Does a Bounce force need to be added?
Solved, although I'm not entirely sure what's the cause. Turns out, whenever I previewed the game in Buildbox and used the Arrows Keys to switch the movement of my character, the Barrier effect wouldn't trigger. However, whenever I used my Mouse Click to switch the movement of the character, the Barrier effect would trigger. I tested the game on my actual phone and the Barrier works. I'm just not sure why moving with Arrow Keys didn't work while moving with Mouse Click did work