Snow Sledder 3D

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 browser-based 3D endless downhill snow-sledding game titled “Snow Sledder 3D,” using a bright, clean low-poly/cartoon aesthetic. Render a wide snowy mountain track in Three.js-style 3D: pale blue sky background with atmospheric fog, a broad white snow field, a lighter 12-unit-wide central sled track, raised blue-white snow banks along both sides, scattered stylized evergreen trees in the distant roadside scenery, soft shadows, and continuously falling white snow particles. Use a low, close first-person chase/ride camera positioned just behind and above the sled, looking down the track; smoothly follow the sled’s lateral movement and tilt subtly when steering. The visible sled is a simple low-poly red sled with a rectangular body, dark seat, two narrow runners, and a curved handlebar. Allow the sled color to change between red, blue, purple, green, and orange as unlocks are earned.

The core game is an endless forward run. The sled automatically travels downhill/forward and the player tries to survive as long as possible while the distance score increases. Start at distance 0 with a starting speed around 15; gradually increase speed based on distance up to roughly 42, and increase obstacle difficulty every 20 meters. Steer horizontally with Arrow Left and Arrow Right: acceleration and damping should give responsive but smooth movement, with the sled constrained to approximately the left/right limits of the track. The sled should visually bank/roll while steering. Jump with Space or Arrow Up; jumping applies an upward impulse, follows gravity, and lands back on the track. A jump cooldown prevents repeated immediate jumps. On touch/mobile layouts, provide large bottom-left and bottom-right left/right arrow buttons and a centered orange JUMP button; on desktop hide these touch controls and show a keyboard hint instead.

Spawn approaching objects ahead of the player at randomized lateral positions and move them toward and past the camera as the run advances. Include these actual obstacle and collectible types: gray faceted rocks, green evergreen trees, rounded white snowbanks, dark icy pits with a pale rim, blue-white jump ramps, and rotating red presents with yellow ribbon and bow. Rocks, trees, and snowbanks cause a wipeout when hit while the sled is on the ground. Pits require the player to be airborne high enough (about y >= .9) to clear them. Ramps are visible jump structures and do not directly end the run on contact. Presents are collectibles: touching one increases the present count, changes the sled style/color, and makes the present disappear. Spawn presents and obstacles with increasing frequency as difficulty rises; recycle/remove objects once they pass behind the player.

Build the HUD as fixed HTML overlays above the 3D canvas. At the top left show a dark translucent navy rounded panel with a white border and bold uppercase text “SNOW SLEDDER 3D.” At the top right show a matching panel with live lines for “Distance: [whole number] m,” “Speed: [whole number],” the best distance/high-score status, and the number of collected sled presents (use a gift/sled indicator). At startup, show a centered dark translucent rounded instruction panel with the large title “Snow Sledder 3D,” explanatory text about riding in first person, steering with arrows, jumping pits, collecting presents, and beating the high score, plus a bright orange rounded “Start Run” button. Also show a bottom-center pill hint reading “← → steer · Space / ↑ jump” while playing. When the run ends, show a centered overlay titled “Wipeout!” or “⭐ NEW HIGH SCORE!” with the distance survived and a “Ride Again” button. A new high score should be stored and should unlock a new sled color/present reward. Persist the best distance, collected presents, and sled style in local storage so they remain across reloads. Use responsive sizing, rounded panels, white text with subtle shadows, orange action buttons, and hide the keyboard hint/touch controls appropriately for the device. The only objective is to ride farther, avoid ground obstacles and pits by steering/jumping, collect presents, and beat the stored best distance.