That's a great time. I still only last a few minutes playing! Thanks for the feedback it's always useful to hear.
The new version will have different themes: Medieval Knight, Pirates and a Future Warrior
The health flasks being kicked around was a feature, like in a film when the villain drops that important item and the random crowd of people uknowingly kick it around as they walk. I thought it'd be amusing.
I totally agree about the shop. It needs a complete overhaul. I like the idea of a cooldown and being able to buy multiple items in one go.