Oh yes!! I was severely hoping you would use an odd time signature after your 'Cola Verde' left a lasting impression on me (I mean, single measures of 5/4, 6/4, 5/4 and 4/4 is just genius!).
You also make the 7/4 very easy to follow, following similar principles as I tried to do. You start each measure with a common instrument and repetitive theme and end it with another instrument and theme. This repetitiveness and clear start and end makes it very easy to follow and nice on the ear.
Let's see if I noticed all your time shifts:
I see you're shifting to 4/4 at 0:39. Classic move, to be able to include a more easy-to-follow melodic progression. And then you go back to 7/4 at 1:06. And at 1:18 a single measure of 8/4 before going back to 7/4 - haha, why not! I see both Blue Lava, you, and me incorporating odd time signatures in our works, which I find so enjoyable given that you two are my biggest inspirations from these jams!
Cool instruments. You use similar instruments as me: a lot of xylophone and strings, some flutes, some cool guiro (which I regrettingly chose not to use!). And this droplet-like instrument, what's it called? Love it! It all fits the forest theme very well!
From 0:39 onwards, the song doesn't feel too fast-paced, which is an interesting choice compared to all other songs I've heard so far. And the chords become... uplifting, hopeful, explorative. This section feels like it fits in some overworld theme. I find it less fitting than the start of the song, as I have slight trouble to imagine a boss phase where this fits well. But I also read that you "struggled to put the three phases and instruments together in a coherent way". Given this struggle, I find that you did a very good job, as the transitions are definitely smooth.
I just noticed your video. Did you draw all of those yourself?? If so, I didn't know you were multi-talented! They all look great!
As usual, very great job :D. I was very excited to hear your song given the awesomeness of your past bosses (heck, I even used Giant Slimy Dragon as inspiration for my giant phase!). And you didn't disappoint, as you never do. Can't wait to hear what you make for the third round!