Hi! I did a quick test and I think it’s pretty cool. :-)
A few issues I noticed: 1. “Go Back” often doesn’t go back (for instance from the “Choose the mount point for device” screen). 2. Pressing F9 (language) replaces lines with funny characters (“herd restart term-tty1” fixes it, so to speak). 3. “Setup the network” (should be “Set up”?) shows “Command failed (No such device”) for a second, and then apparently the installer crashes and term-tty1 is restarted. I’d tend to prefer something slightly more colorful, like Debian’s. But anyway, great work! Ludo’.