To place a wire, press space at the start point and end point of where you would like to place the wire.
Cursor modes (placement):
W - Wire: An open wire with negligible resistance.
B - Battery: A voltage source.
R - Resistor: A wire which resists current flow.
L - Light: A light. (functions as a visual resistor)
S - Switch: Can toggle flow through a segment of wire. Open and close switches by pressing '0'.
Cursor modes (other):
V - Volt-meter: Compare the voltage of two points.
D - Delete: Delete any wires between two points.
Making a circuit:
To make a circuit, you must make a full loop of wire. To make current flow along the circuit, place a battery in the loop. Finally, to control current flow, place a resistor somewhere along the loop.