Thanks for your kind words! Yeah, I think we could have sped up the beginning, but if you leave a stall running for 5 minutes or so, you should be able to get stuck in x)
Maybe our only suggestion is increasing the upgrade cost for the stalls proportional to the amount of stalls you have, this may make other currency's less redundant in the late game. but with that being my only pointer, you have done an amazing job and should be proud.