I'm pretty sure the character art is AI, I can find weird parts and errors that are usual with AI artwork (Emirichu has a weird white floating part behind her shoulder/back, where the shoulder is bigger than her actual back? Her forehead is also grey in the upper part, which is a weird artistic decision. The first character has floating pixels near the hair, the hair melts into the ear and the eyes melt to the face. The neck has green floating pixels from the shirt too. And that's just the first two characters shown!)
The rest of objects/background looks like assets, since the style changes from scene to scene and even in the same scene there's noticeable differences (some have black outlines, others don't, size variation is weird too, rendering of shadows/lights also differs in assets). The blue and white kiosk from emirichu's scene has a weird pattern too, one that you usually see in watermarked assets.
So there's two rules broken:
- You may use pre-made, publicly available, and purchased assets, or other assets you have the legal rights to use. Just remember to credit properly.
- Use of Generative AI is not allowed in any way, shape, or form. This includes but not limited to: Audio/Music, Imagery, game assets, and code scripting.