Wow! Exceedingly polished! The art is exceptional, and the character designs are charming. The music is spooky, adventurous, and filled with action throughout. The immense amount of mechanics are competently implemented and feel great to use.
Holding the button to use rings when they're unable to be used (in village, when MP is too low) causes a loud continuous ringing sound

I was not able to get past this room. This mouse running into this ledge seems to crash the game. I attempted to use console commands in the second room of the castle to warp onto the ledge, but I never found a combination that works, and some of them seem to not work at all when I input them in Chrome ( Attempting pUpgr[5]=1; threw "Uncaught ReferenceError: pUpgr is not defined at <anonymous>:1:1 ..... VM1071:1" ).
Technical issues aside, this was lovely. Fantastic! Great work!