preview-20200425

Added

• New sprite art for all gate types
• One additional level
• Completing a level now gives you the choice of retrying the same level or advancing to the next one.
• Push ESC to pause. From the pause menu, you can resume, restart the level, or quit the game.

Fixed

• Replaying certain levels after completing them no longer immediately completes them again.
• Fixed crash during level load if a gate had >1 output nodes.