It sounds like you’re looking for "The Simpsons" themed content formatted for an old 240x320 pixel screen (common on feature phones like the Sony Ericsson or Nokia S40), and the word "jar" suggests a Java ME (J2ME) application file.
The Simpsons Jar 240x320 Free comes with several features that make it a standout title:
The Simpsons: Minutes to Meltdown: An earlier title where Homer must race against time to prevent a nuclear disaster at the power plant. the simpsons jar 240x320 free
Before the era of modern smartphones (iOS and Android), mobile gaming was dominated by .jar (Java Archive) files. These games were designed for "feature phones" from brands like Nokia, Sony Ericsson, and Motorola.
Conclusion
: A mobile adaptation of the classic arcade action where you chase doughnuts through Springfield. The Simpsons: Minutes to Meltdown
: An action-adventure title where the family survives themed areas like "Explosion Land" and "Unnecessary Surgery Land" after robots malfunction. The Simpsons Arcade It sounds like you’re looking for "The Simpsons"
Here is a draft of the titles that were originally released for that resolution: The Simpsons Game (EA Mobile)