Hello)
1. Price on rollover unit in battle(green if affordable, red if not)
1. About price we will think about it)
2. Showing damage somewhere - in the unit menu mb.
2. You talking about tower damage? yes we will do it)
3. Do not an auto-close window where I can upgrade the unit - I won't upgrade it again.
3. Sadly but its impossible right now(
4. Indicate somewhere that the unit is not the first level.
4. You can see it on tower name then you click on tower lvl-0 and etc
5. Shift+click to auto-update the unit.
5. We will add fast update for tower, by another way but it will be done)