Tametsi

It's lovely when you get a game that is so sound in its logic. I've been stumped even on some earlier puzzles, but every time there's been a solution that is discoverable given enough thought. There's a lot of levels, although I imagine once I complete them I'll be wishing for more. If you like logic puzzles, perhaps dabbled in sudoku or minesweeper (although note, Tametsi doesn't require any guessing), then this should be right up your street.

Probably my favourite game, despite its simplicity. It has enough levels that I don't get bored replaying it.

There is more than 100+ levels. I'm at level 30 and the only reason I even made it so far is because of the goat who made the walkthrough guide