very fun game, but it is very hectic. a pause button would be very nice, as events happen so quickly, that you are never given enough time to look at the new things, that you unlocked or other things like your resources.
also there does seem to be an ending reached by getting 5000 farmland, but i have not found a way to get it, as the normal ending, which is triggered either after you reach either a certain amount of gold, population or power, idk which, will inevitably trigger before reaching that amount, as your farmland will increase those values to the amount that triggers the normal ending with no way to stop it. the best i got was around 2500 farmland, by just spamming farmlands and nothing else.
the 5000 may also just be a cap on the amount of farmland you can get, but the fact, that it is seemingly impossible to reach, along with the fact, that the /5000 only appears after reaching 1000 farmland would make it a very strange cap.