New build targets are thanks to Unity :D
Game not working well on Linux fullscreen most probably will have to be the engine issue, as fullscreen works on other platforms pretty well. We'll add a note that game only works well in Windowed mode on Linux. We might upgrade Unity version some day, stepping away from 5.6.2 to newer versions, which could potentially fix the issue.
Nice catch with the floating connections. It's a legacy thing from when all Zooids could be connected and structure ones were not necessary. This will be fixed along with Zooid visual update, where more explicit connections will be shown.