Major update: New "Retro" level set (100+ levels), hard difficulty level, improved controls and much more

This is a big one - a lot of work has been done to create a bigger and better experience in this update. Many big improvements have been made to the engine that drives the game to create a smoother and more responsive gameplay. Lots of polishing of graphics and tweaks to the gameplay. A new hard difficulty level. And last but not least, a whooping 100+ levels added in a new "Retro" level set.

Here is a brief rundown of the main changes:

• New Retro level set
• Hard difficulty level
• Faster, smoother game engine
• Various visual and gameplay touch-ups
• Controls vastly improved
• Added a minute to time limit
• New brick designs