stationary 'crate' enemy. New map with crates
Improve level balance\cheap shots
Added save checkpoints
dev: refactor duplicate code out into Entity
Shots pass through flags
dev: make shots Entities to remove duplicate code
Fix bug where you could fire two shots with one keypress if there was a frameskip
dev: shorter but possibly not more understandable syntax to run a function and time how long it took
Player image changes when shooting while stationary
Taller monsters, easier to shoot