As a shooter game, Incoming will stand out in how much ammo you use. All of the vehicles have unlimited primary fire and a limited amount of alternate weaponry; since you have to aim with the arrow keys, you'll probably just hold down the fire button and strafe a lot.
You must be careful with being trigger happy since you have ally vehicles and buildings that you can accidentally destroy if you damage too much.
The best tip for your success in this game is to save at the beginning of every phase.
The point system in the game works as follows: