It looks like you're hunting for the J2ME game, specifically the version optimized for 320x240 screen resolution (common for landscape-oriented Java phones like the Nokia Asha or BlackBerry).

This was the native resolution for legendary phones like the Nokia E71, E63, and Asha series , making it the version most veterans remember. Key Features of the Game

If you were lucky, you navigated to the carrier’s "Get It Now" portal. If you were resourceful, you were on a website like GetJar or Mobile9, navigating a labyrinth of pop-up ads on a family desktop computer to find the specific build: Diamond_Rush_320x240.jar .