I've recommended this free waffle to a few people already. As a night-shift worker who likes word games on break, I needed something calming to do before bed that wouldn't keep my brain too wired. There's also a how-to-play guide that's handy if the swap mechanic confuses you at first, which is a nice touch.

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Dropping this here for the group: a solid free spelling bee game that doesn't lock puzzles behind a login or paywall. I tried it out as a word-game enthusiast during a slow afternoon and ended up playing three rounds back to back. The hardest spelling bee words section is a good starting point if the rules feel confusing at first.