Hi! The game's been patched!
The new version has major improvements toward the goal of full controller support - the game is now fully playable with a game pad controller (and keyboard), however no updates are present on the user interface yet - You will have to try it blindly. Hopefully I'm on the right way and the controller mapping is intuitive enough.
Besides the above, some bugs were fixed as well, including an issue with the achievements that were not rewarded when you clear a stage. They will be rewarded in your next run.
Also addressed a bug with the hi-score statistics - in some of the hi-score records the cards displayed in the collection were incorrect.
Some balancing was performed as well. In later stage a crucial boss battle is now a bit easier - one of the enemy units inflicts less damage.
Enjoy!