fork while fork

[alex@FriteBSD ~] % head -n35 frozen-bubble-2.2.0/frozen-bubble
#!/usr/bin/perl
#*****************************************************************************
#
#                          Frozen-Bubble
#
# Copyright (c) 2000-2008 The Frozen-Bubble Team
#
# Originally sponsored by Mandriva <http://www.mandriva.com/>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
#******************************************************************************
#
# Design & Programming by Guillaume Cottenceau between Oct 2001 and Jan 2002.
# Level Editor parts by Kim Joham and David Joham between Oct 2002 and Jan 2003.
# Network game by Guillaume Cottenceau in 2004, 2006 (blah!).
#
# Check official home: http://www.frozen-bubble.org/
#
#******************************************************************************
#
# Yes it uses Perl, you non-believer :-).
#