Among the myriad screen resolutions of that era (128x160, 176x208, 240x320), one reigned supreme: (often referred to as QVGA landscape). This resolution hit the sweet spot between visual fidelity and performance. It offered enough pixel real estate for detailed sprites without lagging the weak ARM processors of the mid-2000s.
Large screen real estate at 320x240 made stealth and tactical games much more immersive. Tom Clancy's Splinter Cell: Conviction java game jar 320x240 top
When you search for you will find many duplicates. Here is how to identify a good file versus a broken one: Among the myriad screen resolutions of that era
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games offered a sophisticated mobile experience for their time, featuring complex gameplay mechanics, improved graphics, and even early 3D environments. Essential Java Games for 320x240 Resolution featuring complex gameplay mechanics