Hi Mew2master! You need to run ./launch command in terminal, it's a bash script located in the game directory. Just running the insatia executable doesn't work because it cannot find necessary libraries packaged with the game (like libSDL2 as you see). The `launch` script sets special environment variable in order to help the executable find them.
BTW if you're enjoying games on itch.io in general, you may consider installing free (and open source) itch.io app. The app makes installing, running and updating most of the itch.io games (including Insatia) very easy - no need to use terminal!