Thanks for playing and the feedback!
I hear the targeting issue, it's something that annoyed me as well. In the version we are working on, we fixed the targeting go to the mouse instead of to the center of the tile your mouse is over, that way it feels more responsive to your inputs.
And yes! I feel the recharge for sure needs something extra to spice it up! I think we could add a little charge animation around the cursor to indicate the cooldown between shots? Maybe that way the player can know when they can shoot and when they can't... What do you think?
If you're interested in the game at all, pop us a follow and we can post updates on the progress to a more polished game!