Heyo,
submitted a new update, here are what should be fixed now:
- localization fixes
- fixed possible issues with upgrades
- improved performance and stability, especially issues where the game lagged when XP popups appeared
Responses to your questions are on their way, we're working our way through the (thankfully) big load of communication and feedback.
Thank you, everyone, for reporting issues and problems, as always they help us greatly.