In this version, the engineer has his own resources (Yes, there can be multiple engineers!), but I did not add code to deduct from his resources whenever he is building. I'll update it and engineer's resources will be deducted, and I'll use the 8-way system for random movements with the enemies.

Yes. I am seeking to create a Isometric game. The thing is just a demonstration. In the real game I'll use the trigonometric calculations to make it linear. Also, I'll use a check system to prevent overrides, and much others. I am designing my own graphics. Only reason that it did not make it to the prototype is because I'll start from the scratch in the real game.