NEW STUFF: I finally updated the game and here is everything new:
New materials: Metal and Energy,
The shop now has 3 MORE STRUCTURES:
The battery, generator, and Factory(credit to Meloveplanets)
The camera can now be controlled via joystick(also credit to Meloveplanets),
There is now a tips button and a restart button.
Enjoy.
Complex mode: energy has to be transferred through a wire instead now and now you need multiple different sets of metal to complete a building in complex mode 
you need to add more stuff like more buildings like factories or skyscrapers or roads. and also more space and a moveable camera. this would probably make the game better