Rebalanced version http://www.stencyl.com/game/play/21061. The only difference between this build and the former, is more resource buildings are pre-placed before a mission begins, and enemy species split less often. (not that you'll have noticed them split anyway, but just so you know not all those red things are running the same numbers).

Also the game runs awfully on chrome for me, I'd avoid it, to my eternal shame its fine on IE.whatevs.

Manage resources whilst trying to avoid over-extending, in this defense ring simulator, Every ten seconds the enemies mutate and multiply becoming stronger in various ways, also every ten seconds your tireless factories will each produce a drone. Drones orbit your city at a distance slightly greater than the distance of the furthest building from the centre.

INSTRUCTIONS.

You can build by selecting a building type on the build panel with the mouse, then clicking in the main game window, shift click multi-building is enabled, press space to cancel.

You cannot build more than a set distance from the centre, you also cannot build if it would cause your resource incomes to become negative.

You lose the game if an enemy reaches the centre.

You can move the view by dragging around in the top right map.

Upgrades are available between tries, prices start at 10 to the 2nd, and grow exponentially.