Hi! Thanks for your feedback.
ASAP, I will try to fix this all. Achievement, shop and coins are pretty new, so I have a lot of work with them. About the X buttons, I will make bigger hitboxes, as they are sometimes hard to click, as you've said.
I will also add some buttons or labels for knowing the prices of the world (2000 clicks except first one, 1000).
The Star Trail is actually being built, so expect some good changes and info about it.
Please, could you tell me more about the troubleshooting with the load and save system so I can help you? Is the manual with code or the cloud one? I will anyway check all the code for this.
Thanks for your honest and constructive review.
Edit: Right now, I have fixed everything. I haven't found the load/save error, but I don't discard there are some... Let me compile and everything will be ok.