I think I have just finished current beta that up to 6th gym.
I got a feedback that it definitely should be improved.
I'm not sure about other puzzle/secret, but during that event of Registeel, I think author should make in-game info for Braille first as well as the "mass of the iron titan"
1) Braille, since this game is about "history" and we have library in this game, should make this a secret book when you try to "communicate" with bookself in order to learn the alphabetical of Braille.
2) "mass of the iron titan", player can't seem to register the info of Registeel in Pokedex nor there is any other info in-game. Like I said in point 1, there should be some hints.
TL;DR
When making puzzle, please give hint so we don't rely on forum or internet for spoiler.
Below is not feedback, just a question:
Why is there a specific altar for catching specific Pokemon? Like Clefairy, Marowak, etc. What is the purpose except they(maybe) can't be caught in the wild?
I don't seem to find any special in-game lore for these Pokemons that have the authority of giving them special map.