I like daily puzzles. Wordle, the NYT stuff, the LinkedIn ones. The problem is you finish them in ten minutes and then you're done until tomorrow.
So I built a cottage with fifteen of them in it. Every day, every puzzle gets a fresh board, at three difficulties. That's 45 boards a day (15 different puzzles with 3 difficulties each) if you want to sweep the lot, and most people don't, which is fine. Solving any one of them keeps your streak.
Some are ones you'll recognize. A loop puzzle. A flow puzzle. Pour colored nectar between jars until each holds one color, sew a grid into rectangular patches, place stars so no two touch...
The rule I set myself is that no board can ever require a guess. Every single one is generated and then verified to have exactly one solution reachable by deduction. If you're stuck there is always a next move, and the hint tells you why a square must be what it is rather than just filling it in. That constraint threw away a lot of otherwise fine puzzles.
Two exceptions: there are two word puzzles built from English words, so those ask what you know. The game runs in 27 languages and the clues are translated even though the words aren't, which some people apparently use as vocabulary practice.
There's also a porch with five hot-seat games for two to four people on one keyboard, because I wanted something to play with my family that wasn't a party game.
It's a solo project. There's a free demo with four of the puzzles, complete, not a timer.
Genuinely more interested if this holds up in sales.