Most Helpful Guy
"... played that game..."
Most Helpful Girl
I have been in that situation often.
Do not double text or write to him again.
Wait a couple of days even.
And try again by writing something that doesn't even mention that you noticed he didn't answer the first message you sent!
This way you seem cool and you seem like you have a life and are not waiting on your cellphone for his reply!
If after a few more days he still doesn't answer to that second message, leave him be! He definitely isn't interested.