It seems you are looking for Java (J2ME) applications or games specifically designed for older mobile phones with a screen resolution of that can connect to Wi-Fi.
If an app doesn't have a dedicated "WiFi" setting, ensure your phone's are set to "WiFi Preferred" in the main system settings. This tells your Java apps to use the wireless chip instead of your SIM card's data. wifi java app download 128x160 better
Note: Ensure you download the file and not just the .jad, as the .jar contains the actual app data. How to Download and Install 128x160 pixels It seems you are looking for