Thanks for your feedback. :)
Since we had - and have - a very limited amount of time to make and finish the game, we deliberately tried to keep it compact.
So, at this point, only very small additions might still make it in.
You can already turn your troops around by selecting them and then clicking them again, entering rotation-mode. We might also allow rotaion after placement.
What would your idea of an in-game shop look like?