For that first cannon level, it requires three shots. it only gives three shots. so if you aim slightly wrong you're screwed. plus, trying to drag the balloons by the balloon and not the hook pops them. so this level is very annoying, and takes several tries when you know the answer. even just one extra shot in the cannon would have been nice, at least.
In regards to the last quest gem incase anyone was wondering
I got mine after 5000 quests. I don't know if that's what usually happens of if the ??? indicated some level of randomness to the exact number.
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