This is a difficult (but possible) collection level. It took a while for me to beat it...
Download it here: http://www.geocities.com/meuumix/BonetowersGishColLvl.zip" target="_blank">BonetowersGishColLvl.zip
Download it here: http://www.geocities.com/meuumix/BonetowersGishColLvl.zip" target="_blank">BonetowersGishColLvl.zip