The game runs quite well if I do say so myself with just a few bugs due to being a little rushed at the end, but the final project was about 26,000 lines of custom code, similar to if we had coded it in pretty much any other engine. As an example, last year Hyde and I created a top down zombie shooter with the engine (this is another example of a coder and an artist/musician working together). Worth noting is that while this engine is initially based around creating RPGs, the scripting engine is open and allows you to create just about any kind of game you can imagine. So if Yami needed art, he might ask Archeia for an assist while Archeia might ask Yami for help with code. Yami is a proficient coder while Archeia is an amazing artist. This is because they trade what skills they have and help each other out with what skills they have. As an example you might see Archeia and Yami listed on a lot of the same things. If you look around a lot you'll start to see certain names pop up a lot doing a lot of the same things.
One nice thing a lot of "vets" of the RPG Maker series will do is help each other out with what skills they have. The sale price is so low, that the only real risk is time investment, which can be quite substantial for becoming proficient with a given engine. I think that this could provide tons of entertainment, without necessarily ending up with a commecially sucessful game. I don't think there is anything wrong with that at all.
The software really looks like a hobbyist tool for fans of the genre, rather than an engine targeting commercial game development.
I'll have to remember to check back once the sale is over. I'm not sure over what time period the ranking covers, so this could easily be the result of the engine getting a massive short term sales spike during such a big sale. So the engine sells more than any individual game made with the engine. Clicking the Top Sellers tab gives an interesting result RPG Maker is the top seller. As far as I know "To the Moon" is best sold on Steam. Here you can find some games made with RPG maker.