Plain physics is the main thing in AntiVirus / War Virus. The controls are laid out but the physics can be wonky.
Play with keyboard and mouse, timing matters.
You use the keyboard and mouse to play. The controls are neatly laid out.
Most simple tips can help a lot. Positioning your tools at the right angle saves effort.
Q1: What are the controls? A: Keyboard and mouse. Q2: What is the objective? A: Fight the virus. Q3: Are there extra purchases? A: No extra purchases needed. Q4: What is the main mechanic? A: Physics is the main thing.