That is honestly a very good question! If you ever find out I want to know.
Thanks for playing!
also is there a way to speed up the game? it takes a long time to get to the next tier...
You are right, no way for the moment to speed it up but I have a point on my bucket list to revisit this game and to tune it so the progression is interesting to play past the beginning (where it becomes incredibly long). Thanks for the feedback :)