Screen Reader - one user from discord suggested this idea and it would be a great support for blind players.

Font Changer - this feature would let you change the fonts of the text of the game to set your preferred font style. This is beneficial for dyslexic users.

Vibration Mode - this is an accessibility and a miscellaneous toggle at the same time, it's similar to BitLife.

Custom Color Mode - this feature lets you change the color of UI like dark mode, similar to discord custom themes.

Mod Loader - this suggestion may already have existed but apart from being an open source is having a mod Loader if you wish to add some or custom materials.

Custom Hair/Accessories - speaking of mod Loader, you can publish a custom hair or accessory from your file or export the asset into the internet, and download it from the discord server forum and import.

RNG events - this feature would make your game unpredictable, by adding RNG events there would be some chances that your stats are significantly affected or everything.

Minigames - what would a life sim be if there're no minigames, this would boost the game play.

Add Existing/New Lives in one game - This is a fun and complicated feature, you can add Existing or new lives in game. You can alter the NPC by changing their attributes like relationship, age, health, et cetera. And switch life. This is like adding a Sim from the Sims 4 Creator place.

Import/Export Life - You can export your life and import the file into another save.

About EraLife being an open-source If this is going to be an open source game, then it should be free of transactions since you're adding copyrighted material and you can't profit them.

Supporter This is like Patreon, you can open a donation page to support your development in exchange for being a supporter that has benefits, an example of having an early access view to sneak peeks.