Thank you! I'm really glad you enjoyed the game so far that you even bought all the upgrades. Knowing that somebody likes my game so much that he is ready to buy all upgrades is warming my heart :D.
By the way, red crystal doubles your damage. I should have added some powerup feed for showing what powerups do. You gave me an idea how to improve the game!
Hey, what do you think of reaching each other out? If you don't mind, you can give me your e-mail or Discord contact.