From AI-assisted development to Android launch: Starlight Library opens pre-registration

I'm Nico Leon, a solo developer in Korea. My Android idle RPG, Starlight Library, is now accepting Google Play pre-registrations ahead of a planned November 19, 2026 launch at 19:00 JST/KST (10:00 UTC).

The idea is a magical library connecting story worlds. Players form a team of five heroes, develop equipment and pets, and take part in guild activities. The journey includes the Three Kingdoms and, later in progression, Olympus. Automatic combat makes formation and long-term growth the main focus.

I use AI tools for development and visual production while directing the design and adjustments myself. Preparing a release has also meant building operations features: multilingual announcements, maintenance controls and a way for players to revisit notices. Those less visible systems matter when moving beyond a prototype.

The game supports English, Japanese, Korean and Traditional Chinese. It is free to play with optional in-app purchases and randomized items, and requires an internet connection. It has not launched publicly yet.

Pre-register on Google Play:
https://play.google.com/store/apps/details?id=com.thebear9404.starlightlibrary

English trailer:
https://www.youtube.com/watch?v=p5k6eE5c1j4

Official site:
https://playstarlight.co.kr/

If you enjoy team-building idle RPGs, I'd appreciate your thoughts on the concept and trailer. This introduction is from the developer.