The Plain physics in Street Encounter sometimes feel wonky which can affect your aim. I find the controls tricky with physics that may trip you up.
Clicking and moving through the city streets is the main action, using the mouse to aim and fire.
You use arrow keys or WASD to move around, and the mouse aims and fires. Holding shift slows movement for better aim and you can crouch behind cover.
Most players find crouching behind cover helps avoid gunfire and using shift slows movement for better aim. Hold the shift key to slow down movement a little.
Q: What are the controls? A: Arrow keys or WASD to move, mouse to aim and fire, shift to slow, crouch for cover.
Q: What is the objective? A: Clear the city of terrorists by shooting them.
Q: What stated feature exists? A: You can switch weapons to stay effective.
Q: What is the main mechanic? A: Aiming and shooting with mouse while moving.