The "High Quality" tag is not marketing fluff. On a modern Android device, the game renders pixel-perfect CRT shaders (if you choose) and supports —something the original Switch version cannot do. The sprites remain sharp, the water effects in Hydrocity Zone retain their transparency, and the multi-track audio from Tee Lopes never stutters or desyncs.
The decomp (often found on GitHub repositories like stm-v2 or ManiaDecomp ) takes the 2017 masterpiece by Christian Whitehead, Headcannon, and PagodaWest Games and strips it down to its engine guts: the Retro Engine (version 5). By rebuilding that engine for ARM64 (Android’s native architecture), the game runs without emulation overhead. sonic mania plus android decomp high quality