Andy Hall

@testtubegames.com

1281 Followers 782 Following

Game Developer behind TestTubeGames. Enjoy building, finding, and sharing cool science through games / toys / simulations. No AI. My games: https://testtubegames.com Other games I love: https://thescienceplayground.com/ he/him

A simply drawn feynman diagram over what looks like graph paper. Many buttons along the top and bottom for selecting various particles to add, and at the top it lists the goal interaction you're trying to draw. The interaction is shown completed in the main part of the screen, with an electron and positron interacting via a photon.
Dark background with thousands of green and orange-ish particles swirling round what looks like two masses. Makes for a very wavy, loopy pattern.
Picture of a science classroom with a 3D model of a Van de Graaff generator on the table.
Picture from inside a natural history museum with exhibits in a large room, in the distance a sauropod fossil stands near trees. Around the edge of the screen are navigation tools for exploring the space.
Movie poster style image. In the middle, a cartoony scene of a big red letter H wearing glasses, surrounded by a lot of particle tiles and small blue characters. Text: Agent Higgs 2: Escape from the Standard Model. Time for Another Run Directed by TestTubeGames, starring Top Quark and Higgs Boson with Electron, Neutron, Proton, Photon, Pion, Positron, Muon, W's, Z, Neutrinos, Up, Down, Strange, Charm, Gluons, Tau, Bottom, and special guests Sigma One, Sigma Two, Sigma Three, Sigma Four, Sigma Five. Coming August 28, 2026
Colorful cartoon image of the Higgs boson with glasses looking sad while wearing a party hat and surrounded by confetti. Surrounding him in shadow are five blue cartoon character with various expressions - one is happy and holding cupcakes. In the upper corner text says: Trapped 14 Years!
Cartoon scene of Agent Higgs and a mysterious figure with their face obscured by a hat both standing in front of a locked door. The figure is saying "It's time for lights out"
Feynman diagram of the quark representation of a proton on the left and neutron on the right interacting via a down/antidown quark pair. In this version, basically it's a down that turns into an antidown... except the line points backward in time instead of forward, meaning the arrows *do* line up.
Line drawings of feynman diagrams - in which a neutron and proton interact via a negative pion. The right hand side shows the hadron-view, as I just described. The left side shows the quark view, where the proton is an up-down-up, for instance. In the middle there is a crossing over of quarks (a down and antiup) between the two sides, which is marked to represent the pion. The antiup, however, connects to two up fermion lines on either side, and all are heading in the same temporal direction... which means the arrows are opposed to one another.
Ten red positive charges arranged in an H shape with little arrows pointing away from them, two zero-charge particles are in the middle area of the H. There are also red equipotential lines encircling the H in concentric shapes.
Thick organic yellow/orange lines weaving around one another in roughly the shape of an H.
Simple white H shape floating in blue water with a little tiny sun in the upper corner of the sky. The H is tilted about 20 degrees to the right. Minimalistic 2D drawings style.
Thumbnail from the game Sine Rider, which shows a cartoon snowy slope that seems to have a somewhat regular sine wave to it. There are a pair of tiny characters riding a sled on the curve, and at the bottom there's a math equation representing the curve. Underneath a description: "A game where you use math equations to create the proper slopes for sledding. Created by Chris Walker."
Website titled The Science Playground, subtitle a list of interesting links. There are six thumbnails visible below, sorted into a grid. Many have basic planet images and orbit lines, showing off simulations. The few shown with titles are: "Gravity Simulator - Huffman", "Black Hole Explorer", and "Orbit". There are search options and dropdowns on the left hand side, one of which is set to "gravity"
An interaction diagram, with an interaction that has a proton and electron going in, and a proton an electron coming out. In the middle, a photon line connects them.
Top of the TestTubeGames website with a new icon circled. It's AI in a crossed out red circle. I've highlighted it by circling it for this screenshot. Other than that, the image has the title TestTubeGames, Bringing Science to Life. Next to the "no AI" button are several other social icons, for Mastodon, Youtube, and internal links for Home and Games.
Title Screen of a game with a shadowy cartoon style. Title: Agent Higgs 2: Escape from the Standard Model. Underneath is a scene of a red H wearing groucho-marx glasses hiding among some wooden crates and particles. The particles shown are proton, electron, and muon, all drawn as colorful tiles with letters. Along the left are several UI buttons drawn as file folders: Play, Editor, and About
3 by 3 grid representing a minigolf course with a cartoon flag in the lower left, and a golf club to the right. Four tiles have little dotted-circles in them representing magnetic fields, and there is a red ball with a curved path shown behind it. The ball has gone around the golf course, curving 90 degrees every time it passes through one of the magnetic fields.
Animation of a disk of a few thousand blue and green particles. The disk rotates, and small structures collapse out of it. A large clump of particles forms in the middle, and many smaller satellite clumps form, much like small galaxies. Each has the blue particles more towards the center of the galaxies, and the green particles more spread out, forming clouds around the blue areas.
Animation of a disk of a few thousand blue and green particles. The disk rotates, and small structures collapse out of it. A large clump of particles forms in the middle, and many smaller satellite clumps form, much like small galaxies. Each has the blue particles more towards the center of the galaxies, and the green particles more spread out, forming clouds around the blue areas.
TestTubeGames logo, a test tube filled with purple liquid over a pink circle. Title: Welcome Back! I've got a new project to share today - all about the Cosmic Microwave Background. This is ancient light that's been traveling for billions of years to reach us today.
Header: No AI Worth writing it in its own category here. In general, AI is a vehicle for evil and misinformation. So I think it should be kept as far away from education as possible. As an added bonus, AI harms creators – and sharing creations and supporting creators is the whole reason this site exists. So. No thank you.
Discord server message, small cartoon character icon, message written by andy. "That's that, then. If there are any folks that are against using AI and in the creator space, feel free to track me down elsewhere. You're not alone, and I'd love to support your stuff."
Title screen of the project. A CMB Photon's Journey, Part 1. Subtitle: What is the Cosmic Microwave Background? Underneath is a button that says Begin.
Closer up image of the word Science, with a red heart clearly dotting the i.
Closeup of the title: The Science Playground - with the last word cut off. A couple menu items below it, but also, wait, is that something odd in the word Science? A heart over the i?
Website titled The Science Playground, subtitle a list of interesting links. There are six thumbnails visible below, sorted into a grid. Many have basic planet images and orbit lines, showing off simulations. The few shown with titles are: "Gravity Simulator - Huffman", "Black Hole Explorer", and "Orbit". There are search options and dropdowns on the left hand side, one of which is set to "gravity"
Cartoony book cover with an adorable smiling grey rock sitting on the ground nearby some bright flowers. The dirt is shown in cross section, revealing minerals, fossiles, and worms hidden under the surface. The title I, ROCK, subtitle: A Geology Tale. Words by Katie Slivensky, Pictures by Stepf Stilwell.
Curved grid representing space descending onto a black hole at the bottom of the screen. There is a cartoony rocket ship in the middle of the screen, and many little white dots scattered around the grid. There are numbers above each dot and rocket, each currently set to different values.
Black circle against a purple backround. There are a few dozen cartoony rock-asteroids circling around it, with white trails behind them. There are also a couple dozen small beams of reddish light seeming to spiral away from the black hole.
Simple diagram of light coming in from the left, bouncing off a curved surface inside the cross-section of a telescope, heading back to the left, only to hit another smaller mirror. This bounces the the light to the right again, in a more compact form, until it hits a small lens and then finally a cartoon eye. The labels make it clear that the light is coming in at an angle of 1 degree, and hitting the eye at roughly an angle of 5 degrees.
Two sets of concentric black circles slightly offset from one another against a white background. The way the lines overlap makes an odd pattern that stretches and bends across the screen.
Two side by side simulations, dark backgrounds covered in thousands of tiny blue dots. There are many input fields and sliders over the bottom portion of the simulations, controlling things like object count, pressure, and viscosity. The sim on the left, with viscosity set to 500, has particles that have coalesced into what looks like a long potato, with few particles outside the potato. The one on the right, with viscosity set to 0, has a totally radially symmetric spread of particles. It looks like a scattershot, and there's no clear form or lumping of particles.
Small yellow circle on a grid background. Two rings of small white dots surround it, with each dot having an orange arrow pointing towards the central star. The outer ring has very small arrows, the inner ring has larger arrows. All consistent and symmetrical.
Grainy image of a Foucault Pendulum - in a lobby somewhere with barrier around it, many pegs lined up alone its perimeter, some appear to have fallen. Image from above, and honestly not an ideal angle.
Grid based puzzle game level with various tiles. In cartoony style. There's a red H with glasses, three protons, one neutral pion, one W- boson, and several holes and crates scattered around the level.