There needs to be a practice game mode, or play old games (without sign up).

As it is, I played halfway through the first round, realized I had misunderstood the rules and was stuck, so I gave up. I'm unlikely to come back in 24 hours.

I did read the tutorial, but the swapping/bag mechanism wasn't clear until I used it wrong a few times.

Also the bag icon is unclear. It was only when I got stuck and switches into "click random things" mode that I tried it.