New Hard mode, User interface, and improvements!

Hey everybody! It's update time and there's a challenging new hard mode to test your skills. A new achievement to show proof of your accomplishment as well. But beyond that I spent a fair bit of time making various improvements! Probably the most notable would be the fancy new slide-down menu that appears when you hover your mouse near the top of the frame. Your "spirit bar" is now visible at the top left, and smashing enemies now spawns tokens which fuel your recovery process if you hit 0. Upon pressing escape it will no longer quit the game, but rather pause the game and give you a list of useful shortcut keys. Trading Cards should also be up and running in the next couple days as well. Last but not least I've optimized some things so it should (hopefully) run a little better for some people. As always, thanks for playing! ːsteamhappyː