ESP32 Robot Remote Design

I’m building a mobile robot and need an ESP32-based physical hand-held controller that can drive it wirelessly via Wi-Fi or Bluetooth. The only actions the robot must respond to are Forward, Backward, Rotate Left and Rotate Right—no arm control for now... (Budget: $250 - $750 USD, Jobs: Arduino, Bluetooth, Electronics, Embedded Systems, Firmware Development, Microcontroller, PCB Layout, Robotics)