Every playable build of the Dragon STEM game, in each engine being compared. Live builds passed an independent playtest review; previews are playable while their review runs.
Kairo and Maya face Sludgeburn and Gritsnare at the Blackridge forge. Gritsnare swapped the 4-part fuel wheel for an 8-part one; light the right number of wedges to block the sludge. Three turns, a Mess meter instead of hit points, one sneaky Shortcut, and a Field Notebook at the end.
A blocky voxel world: Terra explores the Greenwild, walks, runs, flies low, digs and builds, and finds four science sparks (soil layers, water clarity, plant ID and erosion).
A duel-select screen and a battle for every villain pair: The Relabeled Wheel in the Caldera (equivalent fractions), The False Forecast at Skyreach (weather graphs), The Trash Tide at Coralhaven (food webs), The Vanishing Trick in the Greenwild (conserving matter), The Copied Alarm in Glitterdeep (tracing sources), and The Silent Beacon finale against Nullwyrm and the Dull King (choosing the right tool).
Kairo and Sludgeburn idle side by side, with a Roar button and a slider; Add Zephyra loads a third dragon while the scene runs. The same scene was built in three.js, Unity and Godot to compare download size, start-up time, memory and frame rate.