Don't worry their is now a free Mac port of the game which doesn't have the same issues as the Wine port.
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You will need to delete the file called "unity.Geod Studio.3DNes.plist" as it contains the inputs you have set and deleting it will set the inputs to the defaults. This is just the way Unity 5 saves inputs so their is no way to change this as far as I know.
Personally a port for the Nintendo 3DS makes more sense especially because Unity does 3D automatically (so you only have to worry about the controls) however the PS Vita port would be nice due having more power (less lag) and a longer battery life.
If you send any help with a port I know a few things related to accelerometer and touch screen input in Unity 5 and I have had some practice I have ported a few of the games I made (on Game Jolt) to iOS and Android however I haven't released them due to one issue, the loading times.
When I play 2 player games it only allows 1 player on the keyboard not 2. For example when I play Mario Bros (NES port) and I play 2 player mode, but I can only control player 1, so...
Could you maybe add the ability to play with 2 people on one keyboard?