Wow amazing game! I often go on itch to play short browser games when I'm bored so this one really surprised me with the overall quality and polish. The puzzle design is great, but also the vibes. Colours, the borders, incredible sound design and the music all make this game feel great to play, even when I'm stuck for an hour because I missed something.
But yeah, like everyone else I'm also stuck and want a hint. Is it ever possible to split a piece you're not controlling? And if not, can you ever split off more than just the head?