Games I built between calculators
Reaction time, memory, typing speed, quick math — pick one and see how you do. Works on a phone, a laptop, or a controller if you've got one plugged in.
Math Blitz: Target 1200 Pts
Take on today's featured challenge! Beat the target score to keep your daily streak going and claim +250 bonus points.
Cyber Reaction
Test and train your quick reaction speed in milliseconds
Test your visual response time. Tap or click as fast as you can the exact instant the screen turns green.
Quantum Matrix
Remember tile patterns and train your short-term memory
Watch glowing tiles light up on a grid, memorize their positions, and tap them all correctly from memory.
Math Blitz
Quick mental math problems against a ticking countdown clock
Solve quick addition, subtraction, and multiplication problems. Chain correct answers together to build higher score multipliers.
Code Velocity
Test your typing speed (WPM) and code typing accuracy
Type real programming keywords, variables, and symbols across a 60-second speed challenge. Track your words per minute and accuracy.
Orbital Vector
Flip gravity between floor and ceiling to dodge obstacles
Guide a glowing runner along a track. Flip gravity upside-down to dodge obstacles and collect power cores.
Chroma Switch
Test your focus: tell if the word matches the color it is printed in
Do not let your brain get tricked! Tell whether a color word matches the ink color it is written in before time expires.
Prism Forge
Construct geometric crystal facets and multi-angle prism structures
Recreate target geometric crystal structures by rotating and fitting polygonal shards into the forge under time pressure.
Gravity Grid
Shift gravity directions to slide energy orbs through hazard mazes
Control the direction of gravity to guide energy spheres through obstacles, hazard spikes, and portals into matching collection zones.
Neural Maze
Memorize synaptic pathways and navigate labyrinths from memory
Observe an illuminated synaptic circuit for a few seconds before it fades. Reconstruct the path step-by-step purely from visual memory.
Laser Logic
Direct animated laser beams using rotating mirrors and optical splitters
Rotate 45° planar mirrors, position beam splitters, and guide animated laser beams into optical target sensors.
Mirror Logic
Analyze asymmetric glyphs and deduce exact reflections and rotations
Test your spatial transformation skills. Identify the mathematically exact mirror reflection or rotation among subtle decoy shapes.
Perspective Lab
Inspect 3D poly-cube structures and match 2D orthographic perspectives
Rotate procedural 3D geometric block assemblages on a turntable and identify matching 2D top-down or elevation projections.
Orbit Mind
Track multiple celestial nodes through intersecting orbital motion
Track designated target nodes as they orbit on intersecting celestial paths, maintaining visual focus through high-speed crossings.
Pixel Cipher
Deduce geometric progression rules and solve 3×3 matrix puzzles
Analyze progressive matrix grids governed by geometric transformation rules (rotation, count, symmetry) to identify the missing 9th tile.
Master Chess Arena
Pure deterministic chess rules engine with AI bot and tactical puzzles
Play full standard chess with deterministic FEN validation, in-browser Minimax AI bot (4 levels), tactical puzzles, and AI Move Coach.
Speed Typing Test
Accurate real-time words-per-minute (WPM) and accuracy evaluation
Measure your touch-typing speed with real-time character-by-character validation, raw vs net WPM calculation, and accuracy tracking.
Classic 9×9 Sudoku
Pure mathematical logic puzzle with deterministic constraint solver
Fill the 9×9 grid so every row, column, and 3×3 box contains numbers 1 through 9. Includes candidate pencil marks and error checks.
SQL Query Challenge
Master database querying through progressive interactive coding scenarios
Write real SQL queries against in-memory relational databases. Test SELECT, JOIN, GROUP BY, and subqueries with instant deterministic evaluation.
Regex Pattern Arena
Crack regular expression challenges against complex match & non-match test suites
Build precise regular expressions that match all target strings while cleanly rejecting all forbidden strings. Immediate visual feedback.
Highway Zero
How long can you survive the highway?
Weave through endless highway traffic in an original futuristic vehicle. Change lanes, boost with nitro, and chain near misses for massive combo bonuses.
Plug in a controller
Xbox, PlayStation, any standard USB or Bluetooth gamepad — plug it in and it just works.
A few minutes a day
Reaction time, mental math, pattern recall — the kind of stuff that's more fun as a game than a worksheet.
No account, no ads
Your scores save to your own device. There's no leaderboard server tracking you between sessions.