Game ideas

While reading through the project brief again, I picked up on the part stating "industrial cutesy cubism". From this I have now started producing a number of test environments in 3D around this cubism idea.
One of these ideas is setting the whole idea for the game.
The player will control some sort of "ship" around a futuristic city. The city will be set at night and be made up of huge skyscraper buildings, all look very similar. As its night, the buildings will all be lit up, with the night sky overhead and a dark fog underneath the payer. This fog will be in place so that the ground does not have to be modeled as well as adding to the atmosphere.
Alien ships will fly in front and have to be shot down by the player.
As well as the ship exploding when hit and shot down, all the buildings will be able to take fire from both the player and the enemies.