I think the song is about coming to terms with an ending relationship
"There's a fragile game you play"
Possibly a mind game the partner is playing which is common in romantic relationships.
"If the ghosts of yesterday if we can't let go whenever, say goodbye"
If the bad times from the past keep coming up and they can't forget about it, just break off the connection between the two lovers.
"No trace of what remains
No stones to mark the graves
Only memories we thought we could deny"
After the relationship is completely over there will still be nice memories that the couple thought they could get rid of.
I think the song is about coming to terms with an ending relationship
"There's a fragile game you play" Possibly a mind game the partner is playing which is common in romantic relationships.
"If the ghosts of yesterday if we can't let go whenever, say goodbye" If the bad times from the past keep coming up and they can't forget about it, just break off the connection between the two lovers.
"No trace of what remains No stones to mark the graves Only memories we thought we could deny" After the relationship is completely over there will still be nice memories that the couple thought they could get rid of.