Hello World!
Maybe it was hard, maybe I did not dedicate the time that I used to dedicate to the never but without a doubt I am super happy with the result. The Game is a bit rough but 100% playable, The MVP is there and thanks to @forevertrash & @samguy for giving me feedback on the game so early and being able to write down various things for a possible future version.
The idea I don't know if it has much to do with the theme "Deeper and Deeper" but I interpreted it as an obsession and wanted to make a puzzle that would reflect some objections in themselves. So the Law of Equivalent Exchange appeared as a shooting star (thanks Fullmetal Alchemist).
It is not something super innovative the cycles of strength and weakness... many games based on elements use the same principle (pokemon, TemTem, Avatar, Rock, Paper & Scissors).

But in fantasy (and real life) alchemists were scientists obsessed with transforming elements, especially lead into silver/gold. So they had to experiment as much as they could with the tools they had for the time.
So the mission in this game is the mecca of every alchemist, to achieve a perfect transmutation! based on 4-element orbs. This is where the Equivalence Exchange Law comes into play

Achieving this has a minimal chance. So for the game I would recommend trying to achieve as many transmutations as possible before failing.
To go even deeper into the law, there are mixed orbs (2-element orbs) that make a 1: 1 change with the opposing elemental orbs when selected.

As final notes, what mechanics would I like to include?
- Re roll so you can change your options by paying a small cost (as the law says, everything has a price)
- Able to emulate the Hold mechanics used in Tetris to manage the orbs.
- Validate that 2 equal orbs are NEVER shown as options (it is too random and unfair).
- VFX and a lot of animations.