Alphabet Train

Cinevva's analyzer read this game's design doc and its source, then wrote the brief below. "Make your own" hands it to the game creator as your opening message, so you start from a real spec rather than a one-line idea.

Create a mobile-friendly 3D educational game titled “Alphabet Train.” Show a bright, colorful low-poly train traveling along a straight track through a sunny pastoral landscape: blue sky with fog, green ground, rounded green hills in the distance, and simple white puffy clouds. Use an elevated three-quarter perspective camera looking toward the train, with smooth horizontal camera movement along the train when the selected letter changes.

The train consists of a red locomotive at the left and 26 connected letter cars extending along the track from A to Z. Each car is a chunky colorful box with a white raised rim, four dark wheels with pale hubs, a large extruded white 3D letter on its front-facing side, and a small dark 3D word label beneath it. Place a simple stylized 3D object representing each vocabulary word above/on each car: A apple, B banana, C car, D doll, E egg, F fish, G grass, H hand, I insect, J jewel, K kite, L lamp, M moon, N numbers, O octopus, P pig, Q quill, R rainbow, S snail, T tree, U umbrella, V van, W window, X xylophone, Y yes, Z zero. The object models can be simple geometric approximations, but they should be recognizable, colorful, and visibly different for every letter. Objects gently rotate continuously; the currently selected object rotates faster.

At startup, display a full-screen translucent start overlay with a rounded white panel centered over the scene. It must read “Alphabet Train” in large orange text, followed by “A 3D learning train from A to Z. Tap each letter car to hear the word and earn a star.” and a prominent blue rounded button labeled “Start the Train.” Behind the overlay, the initial HUD is already visible: top-left rounded panel “Find A,” top-right rounded panel “Stars 0 · Letter 1/26,” and a bottom rounded word card reading “A is for Apple” with the hint “Tap Start to begin the train ride.” Put blue rounded Back and Next buttons near the lower side of the screen (stacked vertically on narrow/mobile screens).

When Start is pressed, hide the overlay, reset to A and zero stars, focus the camera on the A car, announce “A is for Apple” with browser text-to-speech, and emit a few small white smoke puffs near the locomotive. The gameplay HUD remains: top-left “Find [current letter]”; top-right “Stars [count] · Letter [1–26]/26”; bottom card “[letter] is for [Word]” plus the hint “Tap [letter], press [letter], or use Next and Back.”

Core interaction: the player must find/select the current letter car. Tapping/clicking any train car, pressing its A–Z keyboard key, or using Next/Back selects that car. ArrowRight and Next advance one letter (clamped at Z); ArrowLeft and Back go back one letter (clamped at A). Space or Enter repeats the current spoken word. Selecting a different car earns exactly one star, updates the prompt and word card, smoothly moves the camera along the train to center/focus the selected car, enlarges the selected car with a gentle pulsing scale/bounce, speeds up its item rotation, speaks “[letter] is for [Word]” using text-to-speech, and creates rising fading white smoke puffs near the locomotive/camera area. Do not add lives, enemies, timers, or unrelated mechanics. Preserve the simple 26-letter educational progression and show the letter count in the HUD. Use soft shadows, ambient/directional lighting, rounded child-friendly typography/panels, saturated rainbow car colors, and smooth gentle animations.