Resolve queue overflow

pkg/game/conn.go

@@ -101,7 +101,12 @@ func (s *Conn) Write(gc GameCommandInterface) {
 	}
 
 	s.Add(1)
-	s.out <- gc
+	select {
+	case s.out <- gc:
+	default:
+		s.Done()
+		s.Close()
+	}
 }
 
 func (s *Conn) handleLocalWrite() {

pkg/mino/matrix.go

@@ -868,7 +868,11 @@ func (m *Matrix) Moved() {
 		return
 	}
 
-	m.Move <- 0
+	select {
+	case m.Move <- 0:
+	default:
+		m.SetGameOver()
+	}
 }
 
 func (m *Matrix) HardDropPiece() {