Thank you for your very detailed and encouraging feedback! Some sort of rate of change stats are absolutely on my radar for an update, and I have a few ideas I may try for an overhaul of the upgrade descriptions as I’m still trying to find a balance between giving information and communicating theme. On that topic, you’re also certainly not alone in your confusion about what “upgrade locked” means as I’ve received that feedback from other testers as well :) Also your point about money not quite fitting the ice age theme gave me a few ideas that I might try out!