The aim of the game is to eliminate the Vectoid threat before they reach the end of the path. You do this by constructing towers along the path to attack on-coming Vectoids. Success is not based exclusively on the types of tower you select, but where you place them and what upgrade and bonus options you take.
Select a map from the list, click on "Load Map" then select and construct your towers along the path. When you are ready press "Send the Vectoids" at the top of the screen. When you have eliminated the first group you can build some more towers and upgrade existing ones. Press "Send the Vectoids" again to release the next wave.
Vector Tower Defense, game from David Scott, is like other tower defense games: You build towers that automatically attack targets proceeding on a path. The big differences in this game are the graphics, the number of different levels and maps, and the types of towers. The graphics are fairly simple but very clean. I mean not fantastic like a 3D game or anything else, but that could be because it is not a 3D game! And the choice between maps and levels is very original.
The game is actually really fun. When I initially decided to try it out, I looked at it and figured I would not enjoy it. But I was wrong. This game is very addictive. I ended up with a score of 1 036 925 on the switchback map. And you ;)? Play Vector Tower Defense.