great game! my strategy was to make the biggest number using the symbols and score them when i lose :)
small bug i found: if you make a nine using symbols and then very quickly put down something that makes the same symbol combination afterwards, the nine gets scored BUT the tile still stays in the air, and the next time you make a combination of that symbol, it adds the floating nine tile to the combination. i forgot to take a picture and couldn't replicate it :/