Nice game! Good tutorial, very nice feeling when whetting the sword (?), the sound was perfect there! :)
The music became a little repetitive, and it became very quiet when selecting upgrades.
I think also that it might have been better to reduce the time than increase the number of swords to produce. I felt that after making 10 in total I was done :D
Some randomness when mounting the handle to the blade would have been nice too. They always started from the same state.
Very good interpretation of the theme, and nice execution! Very well done!