A week of minor updates

Change log for the last week or so:

• Made the final level beatable, so you can reach the bonus levels
• Added spake key for Jumping  (Thanks reddit)
• Cleaned up menus a bit, including arrows in the level select screen
• Turned the music down
• Removed 5kb of old, broken levels that were still compiled into the game (the game is now 40kb)

It's been great watching stats of everyone playing, Itch.io has pretty good reach. IT's just a hobby for me, so the more people that get to play the better!