-updated tetromino spawn and rotation to follow SRS guidelines
-added a grid to the tetromino field
-line counter now works
-you can now swap between music
-pausing now also pauses the music
-score now works, but so far only keeps track of clearing each line and for soft and hard drops, the score doesn't give you a higher score for multiple lines yet
-fixed issue where background was clipping through the right playing field
-character now does a little animation when you clear a line