Add to Ten

Tiles merge when they add up to 10 or less. Hit exactly 10.
Then do it again with tens. Can you make 100?

Swipe (or use the arrow keys) to slide every tile. When two tiles collide and their sum is 10 or less, they merge by addition. Exactly 10 becomes a 10 tile. Pairs that add up to more than 10 do not merge.
The tens play the same game one level up: 10, 20, 30… merge when their sum is 100 or less, and exactly 100 becomes a 100 tile. Then the hundreds go for 1000.
Stones slide but never merge. Make a tile of 10 or more right next to a stone and it shatters.