Is anyone able to recommend a decent game engine that has an editor for Linux?

I've had a look at Defold and considered Unity but neither of them have usable UI's on Elementary OS.

Just looking for something to keeo me occupied till I can actually begin work on my custom engine...

Attends Game Jam, gets placed right next to esport event speakers, and apparently it's an open game jam where People can come watch us.. We have to use Defold which none of us have used, which makes us All look as idiots.. What the fuck, also the host arrived 2 hours late because he was hungover...