Wargus is a Warcraft 2 clone. Wargus allows you to play Warcraft 2. So unless you have a legal copy of Warcraft 2 (original DOS Version required, won't work with the battle.net edition) Wargus will be pretty useless to you, since it doesn't come with any graphics or sounds itself.
Unit selection - single tap
Multiple selection (rectangle) - double tap + fling
Action (attack, move, etc.) - double tap
Map scroll - fling
Warcraft is a registered trademark of Blizzard Entertainment.