The others have hit the nail on the head. Godot, GMS2 or Unity would be your best bet. Unity is best for tutorials and assets but it’s not the best for 2D. I’m using Godot. It’s simple but takes a while to get your head around it, so learning Godot for a total beginner for a Game Jam might not be the best idea. GMS2 is simple and there’s a free trial for 30 days, it’s probably the quickest to game jam with. Jonas uses GMS2 and is using it for Will You Snail I believe.
There are others but I’ve no experience with them so can’t comment. Also, one last thing on Godot: it requires a tiny bit more work to get it working on itch for html but it’s not a huge problem. Do not leave exporting to the last minute if you’re going to use Godot. In fact, just don’t leave exporting and uploading to the last minute at all.
Happy Game jamming no matter what engine you choose :)