You're looking for a Java game, specifically "Diamond Rush" in a JAR file format, compatible with a 320x240 screen resolution. Here's some information and guidance:

file today can be difficult as many legacy hosting sites have gone offline. Community members on have preserved several versions:

Revisit the game on old Nokia, Sony Ericsson, or Samsung phones.

Every level was a high-stakes puzzle. You’d push a massive stone block to bridge a gap, only to realize you’d trapped yourself in a corner. The meant every pixel counted; you could see the glint of the red gems and the menacing sway of the snakes just ahead. One wrong click of the "5" key or the center D-pad, and a boulder would flatten your sprite with a satisfyingly 8-bit crunch .

Use the checkpoints wisely. If a puzzle looks impossibly dangerous, explore alternative paths—often there is a safer way around a trap.

Here's a more direct approach:

Always ensure you are downloading from reputable archiving sites to avoid malware. Scan any .jar file with antivirus software before installing it on your device or emulator. How to Install and Play

In this paper, we'll outline the steps to create a basic Diamond Rush game in Java. We'll cover the game's mechanics, design, and implementation.