-completely rewrote the game's code
-added next block
-added hold block
-improved lighting of background, reduced lag caused by it
-score system now works properly
-added DAS (delayed auto shift)
-added more music
-game now selects a random song every 2 levels
-added level system and speed increases with each level
-temporarily removed hard drop because I haven't yet found out how to make it work with the new code