Small update

Just a nice and small update to take care of some lil things, as well as a very lil bit of new content.

- Signs above doors are not yellow and have text labels which should hopefully help with figuring out what they are.

- Game now pauses if it loses focus.

- Enemies now gain just a bit less health every loop.

- The volume of the sawblades slicing sound should now be a bit lower.

- Thunder ball and Gas can items now operate on their own timers, rather than being based on random chance.

- Added 2 new items -  Fat heart which allows you to regenerate health, and Dry tentacle which extends your pickup collecting range.

- Added a new champion - the OVERSEER, spider/beholder-like thing that limits the arena with lasers and a constant barrage of bullets.

After this i think im going to take yet another little break, and then try to add some more actual content. 

Hope you enjoy playing!