Changes

• Progress is now saved on individual levels. Come back to the same level after many days and continue that level from where you left off! If you leave a level and go back to the level select screen, your progress for that level will reset.
• The back button on Android now works to navigate between menus, same as tapping the back arrow in the top left.
• Tap outside the grid to deselect the currently-selected block. On Gridlocked difficulty, the block that was deselected will lock its position.
• Made the lock icon more visible on Gridlocked difficulty.
• Visually upgraded the app icon!