version 1.1 changes

Hi all! Made a small number of quick changes to the game for some balance stuff and bugfixing

• added more recovery frames to heavy and super attacks
• increased the reach on Vader's heavy attack
• made the shields unique to each character so that they don't destroy their own projectiles
• made the force shield push back opponent

The heavy attacks were previously not very punishable when you've blocked them. They were also able to kind of frame-trap if the opponent didn't just block afterwards. The force shield was able to destroy your own projectiles, especially for Vader, since his debris spawns from behind him. Additionally, the force shield can now push back opponents to create space between the players if one player feels cornered or otherwise pressured.