An unlocked Posuk appears here if it has never been reviewed or has not been reviewed for 14 days.
You may do each open Posuk once, then a second time only after doing all the other open pesukim. Maximum 2 per Posuk per day. The square gets brighter as you approach 10 Chazaras. At 10, you need 100% Understand before continuing beyond 10.
A green 2 points badge means the recording was approved. Rejected recordings stay in your history, but do not count as a Chazara and may be recorded again.