Mechanics: rules a stranger can paraphrase
A mechanic is a promise about cause and effect. The player should be able to paraphrase that promise in plain language after a few encounters, or you are asking for superstition, not strategy. Mobile hardware adds a layer: a gesture must survive one-handed use, low light, and a moving vehicle’s vibration, constraints that a PC-first prototype can hide until too late, a “later” that is expensive. Resource loops—earn, spend, craft—should name sinks in a way a player can repeat without a spreadsheet, because opacity is a tax on good faith, and good faith is a long-term asset a metrics deck cannot always see. This publication is educational and informational only, without commercial product sales, game distribution, or professional services, per the site’s disclaimer, with contact support@trustedflow.link and post to Çankaya Mahallesi, Atatürk Bulvarı No: 98, Konak, 35210 Izmir, Turkey.
When randomness is part of a mechanic, the design question is whether players can form a model of the distribution, not only whether the mean is fair. A hidden pity timer may be a mercy; hidden manipulation without any clarity is a different moral object, a topic we address in the classroom by comparing two design descriptions side by side and asking which one a player could defend to a friend, a test of language as much as math.
Finally, failure screens deserve design love: a precise failure is a second tutorial, a vague failure is a rumor mill. Mobile players often have thirty seconds, not a forum evening, a reality that should influence copy length, not only font size, a pair of levers a studio can test quickly once it decides to care about sentences as much as about shaders, a care we model by writing these pages in full paragraphs, a model not a product, a product we are not, a "not" a line we hold, a line a margin, a margin Plain Relay, a press a page, a page an end, an end a stop.