I love this game!
Yes the graphics are pathetic by today's standards. Yes it's kind of silly and a very obscure subgenre. And yet I could care less. The gameplay itself is for some reason extremely entertaining. There's simple team commands, upgrade paths, multiple unique levels to play on etc. All this comes together to make a very entertaining game. I think one thing that I enjoy is the simple pick up and play style. You start the game, pick a level and play. A round only takes a few minutes, and you can play one or a series of rounds, "tournament" style.
If you can pick it up for a few bucks, I would fully recommend doing so. It's a gem in a obscure game category.