Unlock without pressing OK button
Auto open safe without confirmation after entering the correct password
I also think it's a problem with the self destruct option.
When you type in your password you have several "wrong" attempts that could delete your database when self destruct is choosen.
Developer has already answered on question "Why is it impossible" on play market. As I remember it was something like "DB decoding requires a lot of calculating power and it's impossible to try to do it after every symbol entering"