1. In ur 18 th move u left the pawn undefended.......He took it with his queen that made his queen to advance in the king's line.....Its somewhat dangerous to allow opponents queen to move freely in or aroung king's line
2.my opinion is, try to keep check before posing threat to a coin.....it might give u an advantage......
This game is pretty good......
Here's a recent game I've played. I think I did pretty well in it. I'm sure there were a few mistakes though. Please take a look and leave comments.