Hello, I absolutely loved your game!
You really put a lot of creativity on the grinding part. As in making grinding useful/entertaining! I loved even more on the key items enchantments and puzzles/dungeon mechanics that you did, clever!
However, it would probably be great to provide us more info as how the key item enhancement works. I notice the the stuff such as 'leather' and 'the one increase MAT" did not increase my parameters? (E.g MAT stuck at 30 and max hp always at 1907 when I used the enhancements)
Nevertheless, good game, I enjoyed it a lot!
(Heck, your balancing compared to mine is awesome!)