I like Gura too. That's why she was the first alternate character I added to the game, and why there are three versions of her.
But there are nearly 50 members in Hololive. As much as I'd like to give all of them a completely unique stage and make them playable so everyone's favorite is fully represented, that's just not realistic. You're right that I don't have deadlines, but I still have limited energy. I've been working on this game that I can't monetize for nearly a year, and I'm kinda burned out. I need to finish it up.
The Reflect level didn't happen because I thought, "Well I want to make a Gura level, but I don't want to actually put any effort into it."
It happened because I thought, "Oh hey, this red shader I accidentally made is pretty cool, but it wouldn't fit on this IRyS level since her whole thing is black and white. Maybe I could use it on an alternate to the IRyS level so this update can have two levels? But what song could I use? Oh hey, the red effect plus the gravity mechanic could fit the dark reflection theme of Reflect. Have the whole level reflected on the bottom, and the second half of the level is traversing the same obstacles but in the opposite direction. And since the next update will be the last, with a Kiara level and Calli boss fight, this level would give Gura at least some stage representation."
I'm sorry you don't think I did Gura justice. If you want more dedicated Gura content in a fangame, I recommend GuraQuest.