H5 play is live
Receipt Riddle now serves the first ten receipt-audit cases directly in the browser as a WebGL/H5 release surface.
AsobiPlaza Next-20
Receipt Riddle
Compare line totals, subtotal, discount, tax, final total, and paid time, then select the one impossible field.
Integer-cent audit
Amounts stay deterministic by checking line totals, subtotal, discount, tax, and final total with integer money math.
One contradiction
Each case has exactly one machine-checkable suspect field, with no freeform parser or long mystery text carrying hidden logic.