Glad you enjoyed it. :D
If there was more time for the jam, I'd spend it on adding more details to the world: different particles depending on the depth, more grass variety, some fauna, perhaps even more locations. I spent way too many days on the UI. :D
Regarding the grass rendering through the sub, it was an addon that used a particle shader, and I didn't have the knowledge to implement some basic depth rendering so it doesn't render it when too close (it works for those speck particles because it's a material which has the property). I found this out a bit too late so couldn't change on time.
Also, there's 3 "extra" things. ;)