Some versions allow remapping in the options menu. Q: Game shows “Invalid resolution” or black borders. A: Make sure you downloaded the 128x160 build – not 176x220 or 240x320.
A: Redownload; the file may be corrupted. Only use .jar files verified for J2ME. contra 4 java game download 128x160
A: Turn off “Screen animations” or “Network permissions” in app settings. Legal & Safety Note Contra is a trademark of Konami. This Java adaptation is fan-made or ported from older mobile versions. Download only if you own the original game or for preservation purposes. Always scan JAR files with an antivirus before transferring. Some versions allow remapping in the options menu
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