First of all, thank you for the deep and sincere criticism. It is through these opinions that we can work to improve the game.
I will try to comment and answer your criticisms and suggestions in the order you put them.
In terms of production time, the game was released approximately seven months ago, not a year and a half as you said. I know this is no excuse but it's our first game. We are learning a lot in the process and trying to improve the game with each update.
About the game being empty and there's still little to do, I really must agree with you. We are trying to add new mechanics with each update and balancing some mechanics from the last updates (like breaking stones, which was added in the last update and we already noticed that it is very unbalanced because gems are very rare).
Unfortunately, we have a very small team, and the tests end up being insufficient, so we're adjusting things between one version and another. For example, in this new version we are working on (0.5.0) we intend to include fishing mechanics, turning wooden logs into planks, and a combat system (because the character will be able to access the interior of the mines).
As for the superficial dialogue, you're right, we've already noticed that deficiency and we're working on trying to improve future dialogues as well as improve the old ones. But everything takes time and we are really with a very small team working in our spare time as the game is not our main job.
As for the city's buildings being mostly locked, this was a design decision, as we are developing the game with each new version, we chose to do this to avoid having to change the city map with each new update (the idea is that we also include new NPCs as we add content to the city in each new version, for example, in the next version you will be able to access the bar that is next to the docks, at the south part of the city)
The Gravel currently can be sold to some NPCs (Humberto and Eliana) but the price of it is very low.
I won't say you're playing it wrong. A game is to be played in the way that the player feels most comfortable and it must be pleasant and fun. I'm sorry you weren't able to enjoy the game at this point. I hope that in the future you will give us another chance and that you can enjoy the game.
By the way, as for the farm update, it's already on our roadmap. It won't be released in this next version yet, but most likely from version 0.6.0 onwards, you will be able to expand your farm with new crops and new buildings with new features.
Thank you very much for the criticisms and suggestions, as has been said, this is what makes us try to bring a new version that is better and better than the previous one.