No. The build is the start, not the end. Once it is assembled the device runs everything it shipped with, and from there it is yours to program, take apart and modify.
What you can do next:
Write your own code in CircuitBlocks. CircuitBlocks is our browser-based editor at code.circuitmess.com. You start with drag-and-drop blocks and can read the MicroPython it generates as you go, so the step to writing code by hand is a short one.
Work through the guides for your device. The usage guides, coding tutorials and project ideas are on the Resources page.
Change the hardware or the firmware. All our projects are open-source, so the schematics and source code are on our GitHub and you can modify the device rather than only use it.
Add another kit. The full range is at https://circuitmess.com/shop-all.
Two things are worth knowing before your first coding session, because both surprise people. CircuitBlocks writes MicroPython over the firmware your device shipped with, so its stock features stop working until you use Restore stock firmware, which puts them back. And a program you run is held in the device's memory, so it clears when the device is reset — your sketches stay saved in your CircuitBlocks account, not on the device. See Why doesn’t the program I wrote in CircuitBlocks stay on the device after a reset?.