Day 6 - Intro and Improvements to reveal function

Day 6 of development was quite successful! Encountered an issue when reloading the level that resulted in broken noise calibration. Used this to create an intro/tutorial level that calibrates the noise there and just references the baseline in the levels. Also, apparently co-routines sometimes run into the reloaded level, so stopped any co-routine upon reload.

Added level 3 with landmines. Of course revelead unless you use your special sonar ability to revel :)

Since this is now actually - against all initial concerns - turning into a somewhat REAL game jam game, I've reached out to community members for music and effects! Let's hope one of them is interested!

Also, game is coming together! Took inspiration from the classic Metal Gear Solid 1 dialogue between snake and the commander :)