I just realised I hadn't spent the credit, but it seems that Google haven't taken it away from me

We've now got £100 of adwords running with two adverts:
WarFoundry
The cross-platform, open source
alternative to Army Builder
and
WarFoundry
Why not try a new cross-platform,
multi-system army creation app?
Better suggestions will be gladly accepted

Oh, and we're only running the adds in Europe so as not to step on the other app's toes in its home country. As far as I know then our ads should be fine (comparisons are allowed in ads these days, even in the UK) but keeping out of the US seems like a reasonable way to show some compromise on not targeting them in any way.