Of course you can see your
or
ro have a rough guess (For example, since the PDs came out, I got the Gordon's Key in 99% of the games - I have 571 of them; so since we have PDs I have played about 600 games; and I have 588 lemon statues, so I have reached level 30 about 589 times [I bet I have died there at least once] so I have certainly played more than 650 games, I would even say more than 700 because I still do rage quits or die in PDs like PD2)
Neko 
,
,
or
still counts as killing and you get the big crystal. Crystal spoilers are:
(all cards),
,
(all pearls),
(you can still kill them when you have it you just won't die on spikes or fruits. They can still spit on you, though),
,
,
and
(all umbrellas) of course.