Hello, despite some adjustments the game keeps being interesting

Regarding upgrading price, it has been lowered, so now the next list will tell you how many satoshi you need to reach to some amounts of 'total daily feed':

total daily feed : 25 - total satoshi spent upgrading : 55,000 satoshi
total daily feed : 35 - total satoshi spent upgrading : 210,000 satoshi
total daily feed : 45 - total satoshi spent upgrading : 465,000 satoshi
total daily feed : 50 - total satoshi spent upgrading : 630,000 satoshi

(cost increment is on 1000 satoshi per upgrade; each amount includes what is spent previosuly, for example the amount of 55,000 satoshi to reach to 25 feed  is part of the 210,000 satoshi to reach to feed 35, and so on )

The matter you have to decide is how many feed are you comfortable to spend every day? The max you can use is 12 per hour, but taking in count that we must complete captchas, let's say you use 11 feed per hour. Or if you are multitasking, maybe you can use 10 feed ( or less ) per hour.

In my case, I use daily around 30 or 50 feed depending how much time I have for game. Threfore I would never upgrade over 50 feed (as the game is currently).