This is described as a prototype, and you really weren't kidding.
The game is way too big, physically. I had to zoom out to 50% for it to fit in my fairly large browser window.
The opening cutscene is painful. The type-on effect is way too slow and can't be sped up. Frankly, for a prototype I wish it was just omitted, because having to wait forever is much worse. It's skippable, but I wanted to read the dialogue. The dialogue itself feels like a rough translation, with some weird terminology used. I'm not sure where POV1 came from, and there's a lot of telling rather than showing. I think there are some interesting ideas here, but it's really hard to follow.
Eventually, I gave up and just skipped through the dialogue hoping there would be some gameplay. There is, but it's also super rough.
It's enough to sorta get an idea of how the game is supposed to play, but it's super clunky and opaque at this point. I strafed around, couldn't figure how to turn, ran into something, stopped, and after a few seconds entered a battle. That was at least fairly straightforward. I did like the UI concept with the buttons near the character. I softlocked it, though, maybe because I tried to open the (unimplemented?) skills menu.
There's music credited, but I didn't hear any. Not fully implemented, or bugged?
The one thing that I can really comment positively on is the art. It's cute, it's bright, it's colourful, it drew me into the game in the first place. I'm not sure if the screenshots shown on this page are in the game but they have a 90s-cartoon energy to them which works great for the genre.
I don't want to be too harsh on this. It think this could be a great game someday. But it's just not there yet, not even close.