Resolution mismatch. The game is rendering off-screen. Fix: Manually edit the emulator's canvas size to exactly 320x240 . Do not use "stretch to full screen" if your monitor is 16:9.
: A notable bug in some 320x240 builds involves red diamonds. If you take a secret exit after picking them up, they may count as collected for that stage but fail to register on the world map, which can prevent you from reaching 100% completion. Core Game Mechanics Special Equipment : You can unlock and use tools like a to break rocks or a Mithril Vest to explore dangerous secret stages. Diamond Rush Java 320x240 Jar
A key feature specific to the 320x240 (landscape) Java version of Diamond Rush Resolution mismatch
: Typically ranges between 300KB and 500KB , making it extremely lightweight for modern hardware. How to Play Diamond Rush Today Do not use "stretch to full screen" if your monitor is 16:9