v1.30 Challenge Update

New stuff and fixes and changes and whatever:

• Added new challenge modes! Accessible through the extras menu, you can toggle new challenges that will get you new stars if you beat either night 6 or 8/25 mode with them on! (Night 6 awards you with a silver star and 8/25 will give you a gold star)
• Added one new easter egg
• Replaced the Sonic Poster easter egg to be more in-line with the upcoming release of Remix Collection
• Made some other easter eggs more common
• Made the game's icon not blurry :)