I feel like there's potential here, perhaps giving more urgency to spin the rotating things would be good, i tried to work over these as fast as possible and it got hectic and fun that way, but it feels a lot like you can take your own time.
I like the fusing mechanic, maybe if you had the objective to combine different ones while having a "mission queue" like have one that demands red/orange/red in a particular order with a specific timing before it expires could be nice, like overcooked!