Build a better approach
Sum Ten is a number chain. Tap a tile, then tap a touching neighbor to grow the chain. If the values add to 10, they clear and new numbers fall in. If the sum goes over 10, the chain restarts from the last tap. Tap a selected tile to trim back to it.
Each clear scores 10. There are no lives. Shuffle if the board looks stuck. A clear is also a setup: the tiles that fall may make the next 10 for you if you leave space instead of scooping every large number.
Turn information into decisions
Look for 9+1, 8+2, 7+3, and 6+4 before you start a long snake. Two-tile tens are cheaper and less likely to overshoot. If your sum is 8, you want a 2, not a 5.
Starting a chain on a 9 that already has a 1 beside it, then wandering off, is how 10s disappear. Keep chains in one region so a trim is cheap. Crossing the board for a stylish path is a good way to land on 11.
Practice for consistent results
After a clear, glance at the new tiles before you tap again. The drop is the puzzle talking. Ignoring it and restarting a random chain wastes the board you just made.
Drill: clear five tens using only two-tile pairs. If you need a third tile, skip that chain. The drill trains the easy 10s that actually pay.