I'm so glad you are enjoying it, makes us very happy to hear!
1. Ah sorry that's all the available locations in the prototype. The full game has way more content coming and the locations are a bit more in depth.
2. Hmm oh no sorry we don't have any alternative keys set up for scanning ☹️
3. The higher quality fossils get swapped out automatically. Sorry it's not very well explained in the prototype. We didn't want people to have to manually replace them each time. In the full game we are aiming to add the option to sell/trade your lower quality bones once they have been upgraded so at least you will have a use for the old ones.