Build 0.7

This week was a fun week to code - I added animations to the level design, transitions, and added a few levels. I've also turned the level selection screen into a scrollable interface with a line of levels. 

There are still a few 'core' animations that I'm missing that I should make - namely the division sign, the number 7, and brackets. 

I've also added the star system. The player will receive stars when 1) solving half of the solutions, 2) solving the solution using all the given pieces, and 3) getting all the solutions. The player will get the option to continue to the next level. The stars will then show in the level selection interface. One of my goals for next week is to make 'unlocking' levels more complicated (i.e. require a minimum amount of stars).