The Basics

Remove two fields with the same number, or two fields with numbers adding up to 10 from the board. Emptying a complete row will remove it from the board and shift everything up. You can add extra rows at the bottom.

Difficulty

I don't fully understand this game. You can add rows or reshuffle. For both ads are shown. To me the rules of the game are unclear, it just offers flexibility for ads. What are the rules, really? When is a game supposed to be over? Not in all games all numbers are used, I am not sure whether this makes it easier or more difficult. Having no 7s in the game makes it harder to match out a 3 for example.

Variation

There are 3 different games, but I am not seeing a whole lot of variation between them.

Visually

Numbers look clear, but simple. Fine for this type of game.

Free vs Paid

Way too many ads. Sure, you can remove them, but there are so many ads it becomes hard to judge whether this game is really a game for you.

Is It Any Good?

I give Numberzilla: Number Math Games 5 out of 10 stars. Fun idea, but unclear and messy execution.