I played this on a Quest 2 via Oculus Link, and I played the jam version. I found it to be a very neat, if flawed, VR experience, and it's a shame that very few people will get to experience it.
I'll start off with the good part: the graphics, music, and overall design is stellar. The limited palette, fog, and solid colours work well together and give the game a unique look. The airy music goes well with the visuals and creates an inviting atmosphere.
The gameplay... I think it has elements that work, but in this case the sum is not more than its parts.
One major issue I had was that the pointer has a limited range, and it's way too short. I pretty much had to stand on top of the spots to hit the notes and sometimes I'd move too far away, and then Mirabella wouldn't quite make it onto the spot, and I'd miss notes. It was really hard to see what was coming because I had to stand so close, and I think it exacerbated the complexity issue mentioned below.
The big issue is that, at least for me, it's just way too intense and complex for a VR game. Getting Mirabella to hit the notes is a pretty significant challenge in and of itself (though I'll be the first to admit I suck at rhythm games). Trying to hit the notes and also build platforms and also defend against caterpillars and also manage limited magic is just way too much to handle at once.
It took me a while to figure out how to grow a mushroom (maybe a prompt would help?) and while I was trying to figure that out, I was missing note after note. I never built more than one mushroom; I didn't see how I could tear myself and Mirabella away from the notes to build elsewhere and wasn't sure I could get her back up on the first mushroom I built. In fact, I wasn't even paying attention to the amount of magic I had or what the caterpillar was doing.
I think that it presents itself as a very relaxed and chill experience initially didn't help; I kind of set my expectations wrong after the menu and first level. Maybe this is the experience some people are looking for, but it's not one I was prepared for or expecting.
Part of might be pacing, too; the mechanics are introduced too quickly to really get past the still-figuring-stuff-out stage, and maybe if the notes were slower or done in waves it would give the player more time to play with the other mechanics.
All the mechanics are executed competently, and I think some of them would be a lot of fun on their own. I had fun with the first stage just catching the notes, and I think having premade platforms to jump between would be really fun. I think a VR tower defense game where you stand up top and guide Mirabella around building mushroom towers would be really fun, too. With everything thrown at me at once, though, it just becomes unmanagable.
As an aside, I love the credits on the rocks off to the side on the main menu; that's the kind of diegetic UI that only makes sense in VR but makes so much sense in VR.
It seems to be quite well polished, with proper menus and everything, but doesn't seem to have a stage select which is something I'd really like to see. It also didn't show the controllers when they were put down, but I'm not sure if that's an issue with the game or an issue with my setup.
Finally, I have to take a moment to mention how impressive this is technically. It's not only a VR game, but a mechanically complex and very polished VR game, put together for a one month game jam. I've noticed you basically pump out games; how do you manage that? I only manage a handful a year, and they're not this nice.