Crazy pace to be honest. I would have thought this would be 3hours+ minimum!

I'm currently working my way through the game semi slowly whilst playing other games so will hopefully have it fully 100% completed soon so hopefully can answer the Question about the gems completion soon.

If there is nothing for acquiring all gems, I think sticking to acquiring all coins, all eggs and the bonus ball is definitely the way to go for 100% starting from a clean playthrough.

Super fun game from my childhood and really glad there's people playing this.