The green '1' to start playing from that level.
I don't see that button. Can you show me a screencap of what you see when you start the game? My email is firstname.lastname@example.org, or if you know how to do image embeds here you can do that.
I notice also on your creator page versificator.itch.io, the link to your paypal is a duplicate of the link to your amazon wishlist.