Patch v1.0.1

I've pushed a minor patch that adds a little extra polish based on the feedback I've gotten!

• The acid upgrades have been improved so that each level of acid has a bigger impact.
• Added some new user interface animations
• The number keys 1-4 can now be used as optional hotkeys to quickly select upgrades, when in the upgrades menu
• Slightly reduced filesize by compressing music
• A few other little odds and ends