Thanks for responding.
There are a couple of things:
1. When the game tells me all shells collected, I assumed, I can move on to next area but then I realized I can pick those shiney ones and kept on collecting rare shells. I felt the message was incorrect then.
2. When I am really ready to go to next area, I wish the game would tell me, hey, now you have enough coins to go to next one.
3. Maybe turn this into actual clicker! Buy a robot to collect those shells for you! Lol!