Im a little unsure on what the health upgrade does and I would like to see more viratry in the enemies, maybe some that aren't a one-shot kill or some faster ones.
^an idea (though with no development experience i have no idea how possible this is) an idea is to keep it scrolling down except when you click on the scroll bar.
i have an idea on the upgrades there are more then one way to upgrade one that gets the overall tower better (range and attack) one that is kinda like the towers specialty tortoise has bigger radius snake does more poison damage. the wild agility will have a better chance of being activated as the last upgrade choice.
also i have an idea about a new unit a spy who runs across the battle field and if he gets to the other side you can see the enimeys stats ie: respect, gold and exp and have a upgread that allows him to clock and pass by units unnoticed
I don't see why not, and the the skill would increase the % of shielding, will see what I can do