Lumen

Lumen is a vertical number guessing puzzle mobile game. Players tap number keys to form a guess, and after confirming, they immediately learn whether the answer is too high or too low, while the range bar gradually narrows the set of still-possible numbers. Matches start from 1 to 100 and gradually expand to 1 to 1000 as levels progress. Classic rounds focus on binary narrowing; Lightning rounds add a countdown; Odd/Even rounds reveal whether the answer is odd or even after the first guess; Echo rounds light up number keys related to the answer; Squeeze rounds tighten the remaining attempts even further. A correct guess earns base points, using fewer attempts grants extra bonus points, and consecutive correct guesses build a combo. Each life has a limited number of attempts; running out of attempts or the countdown ending deducts a life, and when all three lives are gone, the round is settled and the high score is recorded. Controls are direct, while strategy lies in range trade-offs, attempt allocation, and making use of clues.