I'm talking about those sidescrolling "RTS" games where you buy units that automatically march to the right and use a cannon to support their attacks, that pattern is very common on the app store but I don't know the name for it.
If your looking for a good one, get Cartoon Wars. It is the only one that is actually challenging, that I have found.
They're sort of called Castle Defense games, but they're a bit different. Castle Conflict is a good one.
I hate them all (and went through quite a few until I found LASW), just wanted to know the name for the genre for easy referencing.