It is my own preference, ambient music is just more neutral. It doesn’t sound like music in the traditional sense. Ambient is quite broad term, a lot of subgenres there.
I just feel that a small creature life game would benefit from natural sounds more, and battle music for boss fights on top of ambient soundtrack could be more impactful. The premise is serious (destruction of home), so perhaps even orchestral track would be more atmospheric (Hans Zimmer, E.S.Posthumus for example)