[a-nikolaev]

Emojis are normally used inlined in text. So, I think, they should demo theirs the same size as they would be when inlined in text. Otherwise hard to tell tell the emoji quality. I'm also a bit concerned with the thick black outlines, they may look not as good at the small scale (may look too noisy or may overpower small color details).

[hbn]

At least the lines aren't as horribly thick as Microsoft's current emoji set. Though I think they're gonna be redoing all their emojis with a 3D art style soon

[layer8]

Yes, it doesn’t look like they would be suitable for low-DPI screens at regular text size.