First of all, as a Soduku lover, this game is FLIPPING AMAZING and so much fun!!
The health level is good, a little forgiving.
The theme is a very fun mix of Soduku and Shoot Em Up.
And it's incredibly challenging, even for one who can do sudoku in pen. XD

TIPS:
-It definitely needs music or at least sound.
-I went to the main menu to restart, started a new game, and suddenly I couldn't move? So I force quit and went back in.


Great job though! I'll keep this on my computer to play during work. XD hehe. I mean, *after* work.

That is an excellent use of the theme. Really great idea.
But that way too difficult to me.

I did it!!! Holy fudge favorite game. 

Fantastic idea, but unfortunately I'm no good at sudoku! Adding the shooting mechanic makes it almost impossible for me to keep track of the numbers. But this seems like a ton of fun for people who are better at sudoku. There'a lot of interesting challenge to balancing the need to kill the enemies with the need to control the numbers. I agree with other commenters that it could use some music/sound effects.

Interesting concept but the variation in playstyle means I couldn't think! Probably needs a little more downtime between waves.

Wow. You truely embraced the theme! Great idea but very hard.

So difficult :D Sound effects and some feeling should be added here, but it is okay, just develop it. I was surprised that I had to shoot to change a number, crazy!

That was really stressful. I feel like the random variation in waves, while sometimes providing a welcome respite, was occasionally a little too random, and a few times a new wave would spawn just after I cleared one. Maybe wave timers could be dependent on the difficulty of the wave before them? I'd also personally like the difficulty to increase with the number of tiles found, along with possibly some small bonus for completing a set of tiles like bonus time to next wave or health regen.

I love sudoku. Shooting & sudoku really works!
(My wishes: want sound effects, maybe different controls(how about shooting with arrows?))
5 star!

Arrrrrrrrrg! How am I supposed to concentrate while those… Those… How is it even possible that furnitures *attacks* me?! That's a nightmare… T_T If only I could… I could… Wake up…

As you have probably understood, I didn't make it to the end - I mean, the end of the sudoku, *my* end, no matter, I just have to try solving the sudoku. And so, I think the theme is fully observed here. Well done - and bravo to the ones who have better concentration than me, and have win this very challenging game. ^_^