Did mine with dirtypcbs.com and got 10. Her shown with the USB connectors:
Get the components and solder them (the uC might be a bit tricky at home). Not all components are needed to make it work.
When first connecting the device you should connect BOOT0 to 3V3. This makes it entering the DFU bootloader mode, allowing you to upload the firmware image. This is the only time that you actually need a tool on the PC side (besides an editor).
Let's see the hello world! Connect the stick, open main.lua in its root directory using your favourite editor and paste the following lua script:
while true do
Save and unmount/eject the device (but keep it plugged in)
Push the rotary switch and let the fun begin: every 0-10 seconds the stick will type "hello world" <enter>. Be careful: it really types it. Unplug the stick to stop.