Hey dude, I just supported you because I love this game. It is amazing for being a free game.
Some suggestions:
1) Button to skip all units to end turn. I have to routinely press 'N' 20-30 times at the end of every turn because my units aren't moving between waves. I played the game on armorgames and didn't see that you have a keyboard shortcut to end turn.
2) A unit's range should be viewable.
3) I should be able to click enemy units to see their stats? I have no idea which units are ranged and realize it a little too late sometimes.
4) Maybe have a drag and move feature.
5) Zooming in and out of the map would be helpful.
6) Full Screen option.