About Blade Reflex
What the number actually means
The measurement is taken with the browser's high-resolution clock at the moment the target is created and again at the moment your input arrives. Nothing sits in between except the frame you saw it on.
Typical human simple visual reaction time is roughly 200 to 280 milliseconds, and the scoring here treats 180 as effectively perfect and 600 as the slow end of a hit. If you are seeing numbers in the 500s, that usually means you were looking at the wrong part of the field rather than that you are slow.
There are no global leaderboards on this site and no invented rankings. Sword Arcade has no accounts and no server-side storage, so it genuinely cannot measure anyone else's reaction and does not pretend to.
Two ways to lose, both deliberate
Striking before a target appears costs a life. Without that penalty, the optimal strategy would be to hammer the button and let the early wide windows catch some of them, which is not a reaction test.
Letting a target time out also costs a life. Without that, there would be no pressure at all and the game would reduce to waiting comfortably.
Three lives, and the target's window shrinks from about 1.25 seconds at round one to half a second by round twenty-two.
The bar chart is the useful readout
Your last twelve reactions are drawn as a small bar chart along the bottom of the screen, taller for faster. Your best is one number; your consistency is the shape of that chart.
Consistency is the thing that actually improves with practice. Raw reaction speed has a hard biological floor and most adults are close to it already, but variance - the difference between your fastest and your slowest - has a great deal of room in it.
How to play
- Press Start. Wait. The screen says so.
- A target appears at a random position and a random moment.
- Press Space, or click it, as fast as you can.
- Striking before a target appears costs a life. So does letting one time out.
- The window shrinks as you go. Three lives, and the run ends when they do.
Controls
| Where | What to do |
|---|---|
| Strike | Space, J or K - position does not matter |
| Mouse | Click the target |
| Touch | Tap anywhere, or use the Attack button |
| Pause | Escape or P |
Scoring
These are the point values this game awards, before the combo multiplier is applied where it uses one. Hit quality changes the figure: a strike at the centre of the correct moment is worth substantially more than one at the edge of it.
Tips
- Watch the whole field, not the middle. Targets appear anywhere inside the frame.
- Do not anticipate. The wait is genuinely random and guessing costs a life.
- Use the keyboard rather than the mouse - position does not affect the score, only the moment.
- Watch the bar chart at the bottom. Consistency improves far more than raw speed does.
- Somewhere around 250 ms is a good adult reaction. Under 200 is exceptional.
- If your numbers are in the 500s, you are probably looking at the wrong part of the screen.
Common mistakes
- Hammering the button in anticipation, which costs a life every time.
- Staring at the centre of the field when targets appear anywhere in it.
- Chasing a single best number rather than a tighter spread.
- Using the mouse and treating it as an aiming test. It is not - the moment is all that counts.
Features
- Genuinely measured reaction times using the browser's high-resolution clock
- A penalty for striking early, so the test cannot be defeated by mashing
- A shrinking window that scales with how far into the run you are
- A rolling bar chart of your last twelve reactions
- Best and average reported honestly at the end of every run
- No leaderboards and no invented comparisons - this site cannot see anyone else's play
