Automata [Alpha 7]

This update adds improvements to level generation in Endless mode.

The process for building a room involves choosing door locations, drawing paths between opposing doors, and then marking these tiles as "reserved". The rest of the tiles go into a deck and are shuffled. Then it's just a matter of drawing tiles from the deck and adding an element.

Every element is effectively sprayed across the level. This makes for good combat because there's gaps between fighters. However there aren't many corridors or structures to fight within.

So I created a cellular automata routine that would reserve clumps of tiles that I can put on top of the deck. When applied to allies and threats this made for very poor combat. But when applied to walls the level generation was vastly improved. 

Other changes include:

• Updated hook gfx.
• Updated powerup animation.
• Fixed key count not updating when drag-deleting in edit mode.
• Increased minimum room span in Endless.
• Added shield-doors to Endless mode, increasing the difficulty of later levels.