Cool new stuff:

New level: Pit-Fling Panic. You need to fling to get through this level, which may be the hardest one yet!
Your hands now buzz when you get hit!
Fireworks at end of levels look cooler!
Getting armor looks cooler!

Fixes:

All players should now be able to use the fireball powerup
Local leaderboard times are no longer lost after downloading an update
Update to platforms that should improve performance in some levels
Fixed possible crash-causing bug