So, according to the tutorial, you hit the yellow shield icon to do damage to the enemy. Where is this reflected? I hit the shield so many times, but her number never dropped from 2. You're on a severe time restraint for gathering mana to even use an attack, but she throws darts at the target before the mana can ever get back up to 5, so once you've used your 4 spiked balls, you're incredibly lucky to get a 5th.
The one time I did get a 5th ball, and I managed to get 5 gold to spend on upgrades, it took several clicks of the "damage+" button before anything happened, where the icon that looks like an attack on the left went from 1 to 2, but the 5 gold did not change, but also, I still couldn't purchase anything else.
Mostly, I'm curious of how you're supposed to defeat the first opponent. Her numbers never go down and she drains your mana way too fast while slowly whittling away at your health.
So far, the art looks good, and this has potential to be a fun arcade game, but there's only so many times I can take dying on the first level with no sign of progression before I call it quits. I hope there are updates to come, because this does have some genuinely fun potential.