The controls are:
The mouse controls are active, and rather obvious:
The lowest monsters are worth 10 points, the next are worth 20, and the highest are worth 30. Space ships are worth anything from 50-300 points (in 50 point increments, of course).
As with all standard X applications, xinvaders may be customized through entries in the resource manager. This game also works on monochrome screens, but the colors don't mean anything (surprise!).
Here's an example of some of the resources you can set (this would be in your .Xdefaults file):
Vaders*Font: 9x15
Vaders*Scale: 2
Vaders*defaultfore: black
Vaders*defaultback: white
Vaders*Vader1Color: blue
Vaders*Vader2Color: green
Vaders*Vader3Color: red
Vaders*BaseColor: cyan
Vaders*BuildingColor: yellow
Vaders*SpacerColor: gray
Vaders*ShotColor: lavender
Vaders*VshotColor: orange
Vaders*BaseWait: 10
Vaders*VaderWait: 300
Vaders*SpacerWait: 50
Vaders*ShotWait: 10
Vaders*VshotWait: 30
There are lots of resources. You can change all the timings involved. Have fun with it.
Although you can resize the gamewindow, I don't recommend it.
The buildings aren't as good as the arcade, but hey, whatdayawant for free? It also doesn't handle auto-repeat very well, so you should probably turn it off.
This is mine. I'm only letting you use it. Period. Feel free to rip off any of the code you see fit, but have the courtesy to give me credit. Otherwise great hairy beasties will rip your eyes out and eat your flesh when you least expect it.
I'd like to give a lot of credit to Terry Weissman for his roids games. It gave me the guidance on how to do something like this.