Perim Protector is a Tower Defence game that I've been hooked on for a couple weeks. It's a killer, but I've slowly made headway to later levels. I've put together a page of hints, and turret placement screenshots for any others working to try and win this game.
If you consistantly reach levels further than what I have posted, I would be greatly interested in the methodology you used in reaching them. I'll update the tip page at such a time as I defeat the next boss without any monsters reaching the city.
Here's hoping I'm not alone in playing this maddening game.
If you have never played Perim Protector before, here's the web address
Email me anytime: bp47474.aol.com