0.5.19 - Updating Level Countdown Timer

Updating level timer display.  It's currently set to reveal a ghostly piranha, but I'll probably change this in the future.  Maybe to something like a clock.  Also added a visual and sound indication for attempting to buy something without the required note amount and for attempting to unlock a locked treasure chest without a key.  Last but not least, updated the minimap button to show/hide the minimap and the new level display timer.

Current

• Updated level display timer
• Visual and audio indication for failed attempts of buying items and opening chest
• Updated minimap toggle to cycle through displaying minimap and level countdown timer.

What's Next

• More abilities
• More items/treasures
• More gameplay tweaks and balancing