I found a yellow orb to the right but dropped it in a hole to the left by accident and couldn’t get it out in time, in the end I got it stuck in a wall in the left of the purple cave. While exploring the purple cave to the left further I did find two other orbs, blue and red, and returned them to the starting point. I collected 5 coins on my journey. When my time was up I was shown another coin in a yellow cave to the right.
Good luck!
TLX70TLL (not sure if that’s an O or a zero)
P.S. Almost forgot, there was a switch in the right side of the purple cave that opened multiple doors.