Very nice game! I bet it will rock when it will go "gold" :)

Here are a few changes I'd like:
- Scroll heroes with the mouse scroll button or having the heroes in the formation before the pothers in the list
- I find the black transistion (from an area to the another one) quite annoying. I'd remove it if possible, or at least make it in the formation area only
- Block chest animations when cooldowns are in effect to waste precious time

My two cents.