Add Pickups
- Hearts can be picked up to refill health
- store.subscribe is set in the Stage constructor to update the health gauge, but it should probably be in UndergroundScene or higher
- Added the first sound effect
- Added NonLivingEntity class for Entities with static physical bodies
- The Player has a method that determines what happens in a scene when the player collides with the pickup
- Set fatal health for player
Edited by Spencer Williams