Thank you for playing and writing your feedback!
We fully agree that adding a tutorial is necessary to help players who are new to the genre and we are already working on it. It will be part of the next update.
Regarding the game opening twice, we haven't seen this issue before. It might be an issue with the game engine we use (Godot). We are still using the 4.3 version and will update to 4.5 once it's released. Hopefully that will resolve it.