z80 Tower Defense?

My first introduction to tower defense games were in StarCraft maybe 10 years ago, but they were super fun and i liked working together for once (instead of fighting against each other). Later several years passed until i stumbled across an odd little game where you build little towers, earned money, upgraded them and built new ones. The concept was so simple and the gameplay was so easy, but it was super addicting. I don't play games that much anymore, but every once in a while i'll hop online and it's almost always tower defense games i end up playing. I found a nice little game on ticalc:
http://www.ticalc.org/archives/files/fi ... 42692.html
..but it just doesn't feel complete. It's got some bugs, tower types are limited, no campaign, etc. Don't get me wrong, it's a really fun game and pretty well implemented, it just doesn't quite feel polished. I dunno if any of you like/play/have played TD games, but it seems relatively simple. You could even limit the viewing area to one screen (like the other version) and put all processing power into those little bullets shooting everywhere
So how 'bout it, TD z80?
http://www.ticalc.org/archives/files/fi ... 42692.html
..but it just doesn't feel complete. It's got some bugs, tower types are limited, no campaign, etc. Don't get me wrong, it's a really fun game and pretty well implemented, it just doesn't quite feel polished. I dunno if any of you like/play/have played TD games, but it seems relatively simple. You could even limit the viewing area to one screen (like the other version) and put all processing power into those little bullets shooting everywhere

So how 'bout it, TD z80?