Android Game Level Progression Update

I need a quick but clean update to my existing Android mobile game. Right now, when a player finishes a level the game does not always behave as intended: on relaunch it skips directly to the next level and there is no simple way to revisit earlier stages.

Your task is to revise the level-handling logic so that:
• the very moment a player completes a level, the following level loads automatically without extra taps,
• on every fresh launch the game knows exactly where the player left off instead of jumping ahead, and
• a player can freely move back to any previously cleared level (a level-select screen, swipe gesture, or another intuitive solution—whichever fits best with the current code base).

I will supply the full Android project, assets, and any current scripts you need. Please show examples of past work on Android games where you modified or built level progression; seeing a short clip, APK, or repository link is ideal.

Deliverables I expect at hand-off:
1. Updated source code with clear comments on all changes.
2. A signed APK so I can test on device immediately.
3. Brief implementation notes explaining how to add future levels using your new system.

Once these three points work flawlessly on my side, the job is done.
गेम आईफोन एंड एंड्राइड दोनों में चलना चाहिए और गेम एक लेवल के बाद दूसरा लेवल ऑटोमेटिक आना चाहिए और गेम आगे पीछे करने का भी ऑप्शन आना चाहिए इसमें कि हम आगे का लेवल खेलने तो पीछे भी जा सके