added class for box-shaped player
added class for ground box
cleaned up
writing simulation of player for physics tweaking
added file for storing ideas, todos, etc
updated with gravity and collision notes
wrote basic gravity and jumping system
cleaned up imports
added running and running while jumping
added abstract entity class
cleaned up
deleted
deleted
added directory for entity classes
entity hierarchy
reimplementing Gravity to be more generic
finished refactoring physics system (still really buggy)
added TODO for new nextStep() idea