I like the dynamics of this game :) And very well done for the first project! :)

What works:

• it is really satisfying to use upgraded character on the dragon.

What didn't work for me:

• the controls worked differently from the explained tutorial text. (though it is quite easy to figure them out)
• the initial characters without abilities cannot protect themselves and dodging is not an option from dragon's AOE. which means you have to sacrifice some minions to get some other upgraded.
• I was struggling with the camera move because I needed to move the camera sometimes when I also was trying to point minions in another direction. I think these two control points should be segregated - you shouldn't move camera and minions at the same time. Though I might be missing something, please let me know if there is a way to move the camera without minions following the mouse, I would like to try again :)

What would I improve:

• the dragon rotation and abilities. I would leave the helmets spawn it works fine, but the AOE is too powerful
• I think too many things happening at the same time which could be segregated - picking up helmets and trying to upgrade some minions and trying to attack is too much. maybe there is a way to automate these. For example instead of spawning same minions, you can create several spawn points and give them objectives - pick up helmets, attack dragon...