First post-jam update: build 22

What’s new:

• Added a second level
• Added end-of-level player animation (antenna extending)
• Slightly altered background texture
• Bugfix: player velocity is now properly zeroed out when respawning
• Bugfix: elapsed time format was wrong on end-of-level screen
• Bugfix: the big rock obstacles didn’t allow ground movement when the player was on top of them