Game restarts if user runs out of time.

Currently very lagged.
improvements
Merge branch 'aankhi-potato3'

Conflicts:
	Assets/Array_GameObj.cs
	Assets/BlockControl.cs
	Assets/Board.cs
	Assets/Scene1.unity
Highlight is destroyed right after the shape can't move.
Bug fixes, press enter for pieces + gameover
Fixed layer clear delay.
Merge branch 'aankhi-fixes'

Conflicts:
	Assets/BlockControl.cs