Hey! Thanks for taking the time to play Fidel & The Maker's Trial! The game is a year old and since then I have definitely learned a lot about RPG Maker and game design as a whole. Some implementation of concepts was poorly conceived, though, I must admit, the game has been thoroughly bug tested, so I'm concerned to hear that it is "full of bugs, [and is] impossible to play in a pleasant way". If you have a moment to spare, I would appreciate an explanation of what bugs you found and where, that way I can fix them and make sure the game is in a better state for those who wish to play it in the future.
Concerning any plugins in this game, as stated on this game's store page in the "about" section,
"The original design of this game was to learn RPG Maker at a more fundamental level, and therefore I did not use any plugins whatsoever. However, as of the 1.3 update, I implemented some basic QoL plugins to improve some minor aspects of the game." If you'd like to know more about this, I provide more details in the 1.3 devlog post, titled "Version 1.3 Launch - Polish and Quality of Life changes + A sequel is coming."
There's no point in remaking a short tech demo game that was made as just a way to explore the engine, though I appreciate the suggestion. I would rarely recommend any game developer to remake their old games when they should focus more on making newer better titles.
Anyways, all the best! And thanks once again for taking time to play my game.