That was really fun. Took me a bit of time to realise that clicking didn't actually attack lol. I'm not sure why, but the sound of the little enemies dying was really satisfying. Well done!
Viewing post in Crystal Survivor jam comments
I think that you could introduce the the auto-battle before that actual enemies. For example, a mini-tutorial with a stationary enemy. The player will naturally be drawn to check out what it is, without trying to attack yet. After the player comes within range and the auto-attack activates, they'll figure out that they don't need to attack by themselves.