10 Points

The best plan is to avoid making 5, 7 & 9.

This game is fun. My only complaint is the placement of the reset button. I accidentally hit it while playing. Something as simple as a prompt after hitting the button would be a great improvement

Game need to be little harder, now it's even hard to lose.

The game gets pretty trivial if you try to never get anything other than 1, 2, 3, 6 or *.

Thoughts after the second try: it's a bit like minesweeper: simple but deep. Of course the main difference is the length: it seems like you can go on forever, hours, where minesweeper clocks in on seconds.
Don't get fooled by my highscore: i did intentionally ruin the game to and it, so i could go to sleep.
I fancy the suspicion that it gets harder with time, with ever smaller areas to work with, tougher numbers conig up, but that's a question for the developer: is it?
And there's this chance element of minesweeper: do i get a 1, 2, or three? Sometimes there seems to be a pattern (like: 1 2 3 happens in succession), but it gets complicated when several numbers are generated in one move anyway.
Still, i never played sudoku, or almost any numbers game, so i am just not qualified to place the game in the bigger scheme of puzzle games, but i m just fascinated with it. It meets my threshold of intrigue and sophistication paired with no-level entry.