That was the issue! I foolishly used addForce rather than addLinearImpulse and didn't catch it due to vsync! I've uploaded a fixed version

Try holding the spacebar down, if you are doing that already, let me know where you’re getting stuck!

Also, I think my raycasts that check for a valid launch angle are a little too narrow, allowing you to jump exactly parallel to a wall, which will immediately reattach you. I'll make a post-jam fix for this, but for now, just aim the tiniest bit away from the wall