Major Update - Powers/Upgrades System

This is a major update, heading towards where I want the game to be.

Biggest Changes:

• Added powers to replace old "phase" and "bomb" abilities.
• Added in system to choose from a pool of powers. In this version there are only 3, but I will be adding more.
• At the start of a run, choose 1 power from a list of 3 randomly chosen. The power will persist through the entire run.
• I will be adding more powers later, and the framework is there now.
• Added a larger area to the "hook"  so players can more easily grapple without needing so much accuracy. Made grappling smoother as well.

Enemy Changes:

• Big Enemy now has shields. Requires multiple hits to get through the shield.
• Projectile enemy has shields, and has a 1 in 3 chance of being a "bomb". This variant has extra shields, is faster, and explodes in a bomb. Can be used to take out other enemies.

Smaller Changes:

various ui and sounds added.