This is not only a great idea but also incredibly fun! The choices really matter and it's super exciting to make a sword with like +40 attack :D I like that there's different enemy types with different weaknesses, and that there's three loot types.
It may have been cool to be able to choose which loot type you want to build. It also took a little bit to understand what info shows up where, the tutorial definitely helped a bit but also didn't explain everything. Finally, the game crashes for me after like 10-30 seconds in Chrome :(
I love the choice of art style, it works really well! And I feel like the whole game has very high replay value :)