Hey Sukutak! Once again, thank you for the great feedback.
To answer your question - today, the win condition is, once your sword hits 15 meters, you're meant to point your sword upward. That being said, I've had several complaints about how hard it is to get the angle just right. So I'm planning on adjusting that piece a bit to solve this issue.
Secondly, it makes me sad to hear that it's crashing for you at various stages - it's enough of a concern that I've actually decided to re-write the game using GDScript (Godot's natively supported scripting language). This buys me a couple benefits - I can produce a version of the game that will run in browsers, which will solve a lot of concerns I have about cross-platform availability. It'll also hopefully address a lot of these crashes I've been seeing intermittently.
The game was developed using c#, and as much as I love .NET, it's tends to feel like a second class citizen in Godot I'm finding.