I will re-review later because...
...you need to update and fix the purchase button. I looked to make sure others were having the same problem, and almost nobody can buy stuff. However it does seems to be intermitant, so maybe there's a faulty loop, or maybe the ones who have problems go to instructions first? There's gotta be some switch (not literaly a switch statement) that keeps causing the purchase to be blacked out. But as i said, i'll re-review, cause this looks like it'll be quite the expedition