v1.1 - post 7DRL bugfix/polish update

As is 7DRL tradition, I'm releasing a small post-challenge update that fixes a few bugs and otherwise mostly is about sound:

polish:

• new underwater track on the title screen
• in game music likewise shifts to an underwater version when underwater
• added a few sound effects
• added an indicator for current level number
• Shriek ability range reduced by 1
• "Deep Breath" button changed to "Wait" in deep water and" Last Breath" when checkmated with an accompanying animation

bug fixes:

• fixed some game crashing level generation bugs
• fixed a really janky resolution issue on retina displays
• fixed a few pathfinding issues that were causing enemies to stand still too long often blocking your path
• improved performance on later levels
• total levels increased from 7 to 8
• fixed a bug with upgrades which were hiding several later upgrades totally
• fixed a typo
• I think I've fixed a nasty visual glitch with vertical gaps between sprites

Thanks to my patrons, to my early playtesters (it was a HUGE help), and to you!

I'll have a Deep Breath postmortem out shortly.