At the end of the game (I assume) there is a direction to "check out the battery," It obviously has no cables attached.

At this point I had no "fireflies" to get tips-like where might the cables be found. Game now limits action to the car. No more "fireflies." This ends the game: unresolved. Not enough hints. Need to be able to skip puzzles without a number of "fireflies" otherwise player is stuck.