Let me share my phaser3 game:
https://donutdoggames.com/greatest-alchemist/
The game is very simple:
Click on the top (or bottom) to add elements to the middle
If there are two (or more) elements they try to combine. In case of success you get new element. And when repeat.
There are over 700 items, grouped into 40 categories, with more than 2,000 possible combinations.
Here is my blog post about the game: the Greatest Alchemist | Donut Dog Games - by Donut Dog
If you have suggestions how to improve UI/UX, let me know. It’s my weakest point, so any feedback is welcome.