Thernys's Comments

'Diminishing returns' rather than 'incremental', since speed multiplier increase at prestige is capped by completed missions (x1.5/x2/x3 with ending), and missions are limited in number. This obviously becomes a smaller and smaller percentage of your already accumulated speed multiplier as the game goes on. Prestige after 6 hours, so the next run will be 2% faster, and the next one after that 1.8% faster (or whatever)? Not a lot of incentive to keep playing. Otherwise all the progress bars are satisfying enough for a while.

A shortcut, like ctrl-clicking on a tech, to upgrade to next milestone would save a LOT of annoying clicking. (Click tech, make sure NXT is being bought, click to upgrade, click somewhere to hide the buy UI, repeat...)