Unique game mechanics. I found collecting the orbs to be surprisingly satisfying. Adding a pleasant sound effect for collecting them would add a lot to it. I can see this going further, perhaps with more puzzles and harder levels. If the player was in control of when an orb is used it might make it easier to creature more of a puzzle/strategy game. Although, the flow it nice with the automatic orb usage. The color palette is working well. The muted background helps the orbs stand out. The death animation is neat.
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