Beta 0.1.3

Comin' at ya with some more bug fixes:

- Changed the piece selection sound effect to be more audible

- Enemy pieces can no longer spawn on top of trapdoors

- Removed the "exit" part of the Save and Exit button on the main menu, since exiting isn't a thing you do in a browser game

- Fixed a bug where the "forward" button would activate when generating a new room.

As of right now, I've fixed all of the bugs I've been able to replicate and have the ability to fix. There may be one or two more bug fixing updates to come in the near future if I manage to replicate or get the resources to fix some of the remaining reported bugs, but this means that I will now be working major updates for the game soon. My plan for the next major update involves adding several highly requested features (audio volume settings, checkered tiling, etc.) and fixing a few issues that arise from game play mechanics, not bugs.