TLDR; ad farm with no progression and dishonest and dubious upgrade mechanics The speed upgrade is a lie. The percentages are completely off (200% speed is actually closer to 150% in reality). The cost for upgrading increases so quickly it's impossible to not upgrade exclusively by watching ads, there's a forced ad every 30ish seconds, and there's no sense of progression, new states always seem to perfectly match (or even outpace) your income, so you never feel like your doing better.