Unity's default export is Windows, Mac, and Linux, and that's the one I chose, so it should support Linux. Try looking for the executable again, not quite sure what help I can give other than that, apologies.
I had that same thing happen to me while play-testing, I would avoid the spikes sometimes subconsciously and it was so interesting. I was hoping people or someone experienced that same thing as I did! And thank you so much!