Made with Nano Banana 2 Lite · CC0 · 9 Oct 2026

Hand-drawn

Generated from: a scene from a small video game about: Prism Sled Rush Crystal Cavern Rush: a 3D mobile arcade runner in portrait mode. The player controls a glowing hover-sled that races forward through an endless crystal cave. Swipe left and right to switch between 3 lanes, and swipe up to jump over gaps. Glowing crystals can be collected for points, and spiky rock formations must be dodged. Every 30 seconds the cave gets faster and changes color theme (blue, purple, green). Include power-ups: a magnet that pulls in crystals, a shield that survives one hit, and a short speed boost. Use neon-lit crystals with glow and fog, a camera that follows from behind with a slight tilt in turns, and screen shake on hits. Include a main menu, pause, game over with best score saved, settings (sound, vibration) and a short tutorial hint. Use procedural meshes, materials and sounds only, with no external assets. ## Decided in planning - Which games inspire this feel? Crystal Cavern Rush: a 3D mobile arcade runner in portrait mode. The player controls a glowing hover-sled that races forward through an endless crystal cave. Swipe left and right to switch between 3 lanes, and swipe up to jump over gaps. Glowing crystals can be collected for points, and spiky rock formations must be dodged. Every 30 seconds the cave gets faster and changes color theme (blue, purple, green). Include power-ups: a magnet that pulls in crystals, a shield that survives one hit, and a short speed boost. Use neon-lit crystals with glow and fog, a camera that follows from behind with a slight tilt in turns, and screen shake on hits. Include a main menu, pause, game over with best score saved, settings (sound, vibration) and a short tutorial hint. Use procedural meshes, materials and sounds only, with no external assets. - Which games nail this arcade rush feel? Crystal Cavern Rush: a 3D mobile arcade runner in portrait mode. The player controls a glowing hover-sled that races forward through an endless crystal cave. Swipe left and right to switch between 3 lanes, and swipe up to jump over gaps. Glowing crystals can be collected for points, and spiky rock formations must be dodged. Every 30 seconds the cave gets faster and changes color theme (blue, purple, green). Include power-ups: a magnet that pulls in crystals, a shield that survives one hit, and a short speed boost. Use neon-lit crystals with glow and fog, a camera that follows from behind with a slight tilt in turns, and screen shake on hits. Include a main menu, pause, game over with best score saved, settings (sound, vibration) and a short tutorial hint. Use procedural meshes, materials and sounds only, with no external assets. - 2D or 3D? 3D, all the way - Camera view for this rush? Behind the sled - What's the look of your cave? Neon glow and fog - How do power-ups feel in this rush? Rare and game-changing - How does the rush get harder? More obstacles appear - Who or what is piloting this sled? Just the sled itself - What kind of audio fuels this rush? Synth beats that sync to speed ## On the concept board ### Heroes - A neon hover-sled: Glows bright while drifting through dark tunnels. - A crystal-powered drone: Hovers low with spinning crystal rings. - A rune-carved rock racer: Carries a glowing rune engine and stone fins. ### Worlds - A blue crystal tunnel: Speeds through cool glowing walls and gaps. - A purple geode canyon: Weaves between giant glowing geode walls. - A green glowing cavern: Races under bright mossy crystal ceilings. ### Moments - Dodge the spiky rocks: Weave fast between jagged hazards. - Collect the glowing crystals: Snatch crystal clusters while steering three lanes. - Chain the power-up orbs: Grab magnet, shield, and boost in one run. ## First playable milestone One small version of the game that plays from start to finish: the player character with its controls and camera, one place from the board, and the main thing the player does there. Make it look like the art direction. Play it and fix what breaks before adding more. ## Open questions Anything this brief does not decide is still open. For the first playable version, make a reasonable choice, say what you chose, and ask me before locking it in. ## Notes - The board pictures are concept art for the look and feel, not finished game assets. - Talk to me in the language I wrote my idea in., as an in-game screenshot in a hand-drawn ink and watercolour style. Palette: paper #f2e8cf, ink #283618, player tomato #bc4749, threat plum #6d597a, accent leaf #a7c957. Everything is original: never draw or resemble characters, places or logos from existing games, films or brands (no red-capped plumbers, no famous mascots), even when the idea names one. Keep the pictures honest: they promise what a small first version of this game, made in a game engine in a few days, can look like. Simple readable shapes, clear silhouettes, few flat materials, the in-game camera view. Never film stills, photoreal renders, AAA key art, detailed textures, cinematic lighting, or anything that looks like a big-studio game. No text, UI, HUD, logos or editor screens inside any image.