Tip: Switch palace switches normally disappear if you replay the level. However, if you insert them as direct Map16 and use the hex edit at $00EEB2 in the ROM map, you can replay the level without a problem.
Not logged in.
Details for Sonic The Hedgehog 4: Episode I - Mad Gear Zone Act 3
SMW Music - Sonic The Hedgehog 4: Episode I - Mad Gear Zone Act 3
Can be used in Tense, fast-paced levels and final castles.
Edit: Made the echo a bit better.
Edit 2: Optimized it a bit, thanks to bebn legg!
Edit 3: More small optimizations as well as adding some tweaks and extra commands to make it more accurate, at the cost of 21 bytes.