How Fast Can You React?
A precision reflex game where every tap matters.
What it does
Focus Drop is a free browser reflex game built around precision timing, streaks, risk/reward decisions, bombs, 30 campaign levels, Daily Challenges and a global leaderboard.
Focus Drop is a precision reflex game plus Reflex Lab education, a free reaction time test, live player data, and a developer journal. Play free — or learn without playing.
playfocusdrop.com is a reflex-performance site that also ships Focus Drop. Start anywhere — you do not need to play to get value. Precision taps, streaks, bombs, 30 levels, Daily Challenge, leaderboards. Reaction time, speed vs accuracy, attention under load, reaction-game design. Free five-trial simple RT tool with average, best, and interpretation. First-party leaderboard sample — real numbers, honest empty states. How we designed Perfect taps, height multipliers, bombs, and Level 30. Scoring math, special drops, chapter walkthroughs, troubleshooting. Aim for Perfect taps, build streaks, decide between early risk and late safety, and ignore bombs. Campaign contains 30 levels across three…from playfocusdrop.com
Does the same job
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AstraPixels▲267A pixel-art solar system at its real current positions.
Growth · 29d ago · astrapixels.com

Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com