Basic controls - How do I attack?

[ROVOT]

Nothing in the options menu tell me how I can use my vehicle weapons. I know double click can do something, but it's unreliable and doesn't let you fire different weapons. Any ideas?

[eggliest]

well i havent played scribblenauts on the PC but i have played on the ds system and i think you click on the thing ur attacking and a circle should pop up asking if u want 2 do varioous things and one of would be to use the animals weapoms or your weapons hopethis works :)

[ROVOT]

Everyone knows how to do that; I was looking more for a button or key I could press or assign without using context menus...