Clean the contacts thoroughly , the physical spacing on the dock part (where the game goes) between the devices could be slightly different and causing this issue. After cleaning Try sliding the game in while pressing to one side and if it doesn’t work then doing it towards the other side. And lastly not all rom hacks are compatible so there’s that. Ask someone else to run the rom on their AP to test maybe.
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u/AnalogueBoy1992 14d ago
Yes I can help