This is a common problem on ubuntu, the package manager doesn't include the correct version of luajit5.1. You can use the official app image of love which has the correct version packaged with it
Viewing post in Battle for Egg Island jam comments
It’s running!
I dig the graphics and music, holy geez, it looks really good for a jam game.
But I can’t see the build wheel on right-click. It might be my weird-ass ball mouse and re-mapping setup or something, not sure. But I could walk around on the island and get attacked by baddies, so that’s pretty cool. And I think it connected to the server too.
Holy hell, a multiplayer jam game! Good job.