Update! Mainly fixed a few bugs, but added a few things as well

- Fixed bug where enemies wouldnt spawn after reloading level

- Fixed bug where enemies would sometimes spawn outside of the room

- A few general updates and changes behind the scenes

- Unused entrances to rooms are now properly blocked off

- Added a placeholder sprite for the doors opening and closing

- Added a key indicator for defeated enemies

More stuff will be added soon, this was just a quick update, mainly just fixing a few issues