Spark7
The most addictive chain reaction game. Exercise your brain!
About
This electric number puzzle will rewire your brain and may make you miss your bus stop.
The gameplay seems simple at first. Just drop numbered balls into the grid, match them by count, and chain explosive combos (“surges”) to boost your score. But very quickly, you’ll find yourself gradually understanding the game’s hidden nuances over time, continuing to improve your skills and your brainpower during every moment of play.
You’ll also find yourself obsessing over the global top scores for each individual Game ID, and cranking your “replays” to work up the Leaderboard.
The best part is that Spark7 was created by a literal brain scientist. Each game mechanic is meticulously crafted to exercise your spatial reasoning, working memory, processing speed, attention span, and mental resilience.
If the disappearance of Drop 7 left a hole in your puzzle life, Spark7 fills it — and then some. This is the number drop game you didn't know you needed.
Download Spark7 and light up your brain.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
I started posting 'here's what I'm working on next' — not at launch but throughout the year. People started tagging their friends saying 'this is coming, you need this.' That sustained engagement carried me through dead periods where I had nothing actually ready to ship.
Teasing a coming feature before it ships — not just at launch — is what unlocked momentum
Duffett found that pre-announcing upcoming features (with screenshots or demos of in-progress work) drove more engagement than post-launch announcements. Users who anticipated a feature became advocates before it shipped, tagging others and amplifying reach. This created a predictable engagement cycle independent of release cadence — especially valuable for a solo developer whose shipping pace is irregular.
I will beat you just by putting a buy button on the first screen by pure law of numbers right and that's sort of the like un-glamorous app design things that you sometimes need to do to actually optimize the business
Just Put A Buy Button On Screen One — Pure Law Of Numbers Beats Elegant Delayed Paywalls
Jacob's brutal truth: no matter how elegant a delayed-paywall strategy sounds — show the product first, earn trust, then convert — the math kills it. Four out of five users never open the app a second time. Showing a trial CTA on screen one, even if it feels pushy, will out-convert a thoughtfully staged paywall simply because it reaches 5x more people.
There's a play for whatever you're stuck on.
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Comments
1Spark7 is like if Tetris, Dr. Mario, CandyCrush, Sudoku, and 2048 got together and had a baby that is even more satisfying and engaging.