The game does suffer some music-related lag when played in the browser. This is a known issue with MV, so it was something I was expecting to happen. However, it does hurt some of the effect of a scene when the music doesn't come in until many seconds (or even a minute+) later. The most egregious instance of this was when I went into the battle against the Lightning Minotaur, where the battle music took almost a minute to load, and after another almost-minute the battle scene appeared - which caused my computer to start lagging. (This was what led me to download the game instead).
I was amused to see that one of the characters is named Meriel - that's the placeholder name for one of the characters in my main project.
In the Main Generator, if you defeat all the ghosts and the door appears, the game has an error where it's looking for and can't find !Flame.png. After I added that file in, the dialogue for the "Farie" goes outside of the window and is unreadable.
I liked how each element had another it was strong against and one it was weak against, and I liked how the final boss changed between the three elements. I also liked how you get extra weapons for helping the elves in the dungeon turn back from being monsters.