I've checked your game on Samsung Galaxy Ace. Seems to run fine, although the button located on bottom-right seems to be cut on the right edge as if it wasn't made for that resolution.

Also, I find it difficult to pick the numbers because they are too small and you often end up clicking on wrong places. Also, clicking on bottom-right button (e.g. pause) is quite difficult - hotspot area appears to be displaced or something.

I would suggest making buttons as large as possible, perhaps use portrait instead of landscape mode and using bottom half for buttons only and top half for soldiers. Other than that, the game seems pretty responsive considering that my Galaxy Ace is quite slow and unresponsive overall. Later I might be able to test the game on my Samsung Galaxy S2, when support department finish repairing its speaker problem.