Solo developer builds a mobile roguelite with all sprites and sounds generated in code

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Dash & Slash is a one-thumb roguelite for Android and iPhone, built solo with Flutter and Flame and shipped without any image or sound assets from packs. The developer, a QA engineer rather than an artist, chose procedural generation to keep a consistent neon style, a small app size, and easy-to-edit assets. All small visual elements are drawn at startup with Flutter's Canvas into a single 512×512 texture atlas, with color applied per instance and additive blending creating the glow effect. Sound effects, jingles and music loops are synthesized by a Python script from oscillators and filtered noise, using fixed seeds for reproducible output and circular buffers for seamless music loops. The article also describes a bug in the level generator that produced a room the player could not leave.

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