Heya. I have a couple of points to raise with regard to Mushroom Towers. One of which seems to be a bug, the other a suggestion, so I'll just keep the post in here.
When buffed by Blacksmith Towers, no icon is displayed above them.
I'm assuming this is a bug. When you click on them you can see the icon in the tooltip, but there's not the yellow Inner Fire icon that there is when other towers benefit from the buff.
Make Spore Clouds an auto-cast ability.
This one's a suggestion. By doing this, if a player has multiple Mushroom Towers (and their upgraded equivalents), they have much more control over the use of this ability and it won't be burned as soon as a round starts. This will also add a skillful element to Mushroom Tower usage. Of course, you should be able to toggle auto-cast on and off. Thoughts?