No revenue estimate for the App Store: Apple publishes no install counts, and its star-rating counts don't calibrate to sales the way Steam's written reviews do. Reviews and prices only.
There is only one launch pad, at the bottom of the screen. Pull it to aim, release, and fling yourself. While you are fast, you are the shot and hitting an enemy deals damage. When you stop, a touch can hurt you. Stones bounce your path; they do not take health. You do not walk the field and fire, and you cannot drag yourself to shoot. Every launch goes through that pad. The grotto runs eight stretches deep. Each stretch has eight hand-placed fields of pillars and enemy casts, sixty-four in all, and the last field of each stretch is a boss. A field can earn up to three stars: clear it, clear it in time, and take no damage. The next field waits for at least one star on the last. The next stretch waits until you finish the previous last field. Progress stays on this device. Chinese and English can be switched at any time. There are no ads and no in-app purchases.
Trends
Price over time on the United States storefront, quoted in USD — from our own daily price tracking. Other markets are listed under "Price by market" in the Prices tab; they are not on this axis, because one line cannot be two currencies.
Showing the last 90 days (the review-based charts: the last 4 monthly points). Full history and CSV export come with a free account.
Related
Not enough data to name similar games: no other game shares enough of this one's tags.