Hi there! I've just tried running the itch.io build and wasn't able to reproduce this behavior. Perhaps you could try again and/or provide more details for reproducing it?
The first cutscene, with Dr ≈Light plays just fine on my side. However, none of Libra's chime-ins worked at all. And it skipped that whole part at the beginning, where you can't move. It happened before I could even play the game! That "time trials" idea was just speculation. When I got to world 2, Libra's dialogue worked normally.
Also, do health pickups exist in this game? I forget.
TLDR: Stage 1 cutscenes fail for no reason.