Yesterday, I experimented with having AI create a Diablo-style loot-based action RPG.
I spent two days on it, and surprisingly, it went quite smoothly.

Here’s a quick share of the process.
It’s built as a web game.

First, I used Gemini Canvas to generate the initial version.
Then I used Codex to break down the code, refine the structure, and expand the features.

After continuous optimization, within two days I now have:

Basic combat
Equipment system
Skills
Mercenaries
Randomly generated maps
Multiple enemy types

The core gameplay is already functional.
The next step is to design a balanced character progression curve
and proper difficulty scaling.

All monster visuals were generated by Gemini as well.
The style is simple, but it conveys the idea clearly —
honestly beyond my expectations.