9VDC is the supply, but your wire-loop trigger SW2 will be at around 5VDC max between IC1[2] and Gnd (0V).
A human's hand-hand skin resistance can vary from dry skin at about 100K to sweaty at around 1K.
This translates to a maximum DC current (I=V/R) of 50uA to 5mA.
According to wiki/electric shock (info), to feel a sensation of DC current, minimum 5mA is required.
AC (at 60 Hz) requires a minimum of 1mA.
For DC current, its unlikely the gamer would feel anything, especially as the hand-loop is only one side of the circuit.
If the loop is dragged over the wire, the electrical 'noise' may simulate a low-voltage (max 5Vpp) "AC" waveform.
However, the R1/C1/R2 network would likely suppress most spikes.
In summary: no danger, no shock.
Tongue-in-cheek(y) suggestion:
When working with HT voltages of 5V DC, take appropriate safety precautions: Chevron danger-tape, rubber gloves, face-shield, emergency personnel.