you don't have to make a native linux version. Wine handles it very well. But if you wanna make, just make it. As a linux user i thought it would be helpful i say this. bye.
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Oh great! When I was trying to make the native Linux port (or rather when a friend who uses Linux tested it), it worked fine apart from that it couldn't read the metadata file, which meant there info in the map selection menu wasn't showing up. So just to confirm, does that work fine when using wine? And do custom maps load ok? (there's one included in the game, just a copy of Raise Up Your Bat, which are supposed to load in the custom map menu)