Really nice idea and mechanic, nicely put together and worked well on the Quest hardware.
I saw the trailer video, so I knew what to do - but as BBIT says, a hint at the start would have helped new players know you've got to tap the stick.
I know it was a short dev-time, but I feel a lot more could be done with this mechanic, there's a lot of scope there.
One slight thing, I felt the 'echo' effect wasn't fast enough, so as you move forward the echo didn't show much in front of you. It's not a massive thing, and if you slow down it's fine.
Overall, really clever and unique idea and I think it has a lot of scope!