The feeder for the controller is run under the footprint of the splash pad. If considered a pool, this is a violation of 680.10.
Equipotential bonding for the concrete pad and low voltage touch controller have not been installed. This would be a violation of 680.26
The controller basically steps down the voltage to 24 volts and operates solenoid valves to distribute the water from a manifold.
At a minimum, I believe that the feeder should not be located beneath the splash pad, the circuit should be gfci protected, and the touch controller should be bonded back to the equipment.