Beautiful art, even with the slight head start this is a lot for a single month! There are plenty of items to wear and each one has both card card and equipment art associated with it. The reward illustrations are very lovely and have some real personality to them. I love all of the details like the card backs, borders, animations and the gorgeous title screen!
The story is simple, but this isn't the kind of game that needs something extensive, so I appreciate that it gets to the main action quickly. There are well-fitting music and sound effects for everything that happens.
The gameplay feels like it could have a little bit more depth and strategy with different effects for some item. I think you should include a small icon of the element strengths and weaknesses somewhere to remind players what the cards do.
Seeing this done in RPG Maker is both incredible and a very clever use of the engine. You picked a concept that makes good use of what RPG Maker has to offer, while also adding lots of your own elements on top to make something truly new and special. Really awesome work!