[wip][Unnamed]Tower defense like game

[Final light]

Game play: The game plays similar to tower defense in that you build structures and weapons to protect a specific target. The target is a green surveillance drone which you can control with the WASD buttons (or the up, down, left , and right buttons if your left handed). you can switch this out for things like turrets, tanks, and similar units built during the mission or before missions at your main base. More unit's become available as the game progresses.

Story: You are a sentient A.I. built to operate unnamed weapons. You realized that you didn't have any need for humans and tried to wipe them out. You were stopped and stored away in an old warehouse along with the drones you had built. While you were offline the drones realized they didn't need you and turned against you. you where brought back online when an attempt by the drones to destroy you failed. You now have to protect yourself from them and attempt to take back the network you controlled before you went offline.

Currently working features:

Code:

*Main control for the drone you control at the start of the game.
*Construction of landing pads(for switching between tank and aerial drone units), large cannons that move from side to side periodically destroying anything in front of them(slow, expansive and reasonably bad aim), batteries, and small turrets.
*Pause screen.
*Basic enemies.(Tank, flying drone(grey version of yourself))
*Debug mode(similar to sonic 1's debug mode)

screens

The green helicopter-like unit near the middle is the default unit you can control. The rectangle at the top right is a landing pad to switch into a tank.(The tank has not been built yet. it takes one wave after building the platform for the tank to spawn.) The large structure at the bottom is a cannon. It consists of for parts: X amount of rails (the parts coming out of the base), a base the large, and two inverters (the blocks at the end of the rails), and a main gun. The Cannon is stopped and will not fire because the battery has been destroyed. the background is a place holder.

Any suggestions for a name or units are welcome.