Controller support finally added!

A small number of changes here, but important enough for a devlog.

• The most important is that controller support is finally here, and working 100%! The main thing to note is that the DPAD is used in the menu, but the main game features analog stick controls.
• Next, the scores have been massively changed. You can now get upwards of x2000 on the multiplier, as well as a 12 digit score. To make getting hit less painful, the multiplier is simply divided by 2 and rounded up if a decimal is the result.
• Finally, a game crashing bug with the Hyper Charge power ups has been fixed.

Have fun!