What achievements unlock
Of the 30 challenges below, 27 pay coins and three unlock accessories that never appear in the shop — the ribbon (500m in one run), the scarf (a ×5 combo), and the adventurer's hat (300m without a hit). Coins accumulate on their own if you play long enough, so it seemed worth keeping a few rewards out of reach of time alone.
The challenges fall into three groups: ones that clear themselves as you get better, like depth; ones you have to build a whole run around, like a ×5 combo; and ones that fill in from simply showing up, like the daily burrow. Pursuing any single one of them opens a few.
Progress is stored in your browser, so it survives without a login. Clearing site data or switching devices resets it — if the record matters to you, keep playing in the same browser.