Hello, I'm planning to make a small game inspired by high-rise invasion manga. 
The game will be a shooter game with the player vs Ai for the moment ( it will be great as a multiplayer too) 

The game starts on a rooftop of a high building, all rooftops are linked with suspended bridges, and your goal as the player is to gather 3 items from the map . 2 are spawned randomly and the last position will always be the same. The  AI will try to stop you from using weapons too, the same weapons that the player can use. 

After the player finds the first 2 items, their mission now is to find a helicopter and ride it to a higher building that has the last item.

There will be more ai enemies in the helicopter building and all AI will have masks on.

I can make the buildings quickly and do some 3d modeling alongside with the story writing