There actually was a 0.3 version, but I forgot to post it here :D

This update brings some major changes:

• A hub level, where you can choose what level to complete at, most of the times, any order. It is divided into sections, and sections unlock when you get a specific ability.
• Each level now has an end-goal - to activate the levels unique totem near the end, which will bring back some memories :) 
  Feature is not 100% done yet so all levels currently feature a placeholder totem, but the background is set.
• Map screen. Press M/SELECT button at any moment during the game to see the map with all collected cubes and activated checkpoints. In the list to the side you can hover over the checkpoint button to see where it is, and click to set it as an active respawn location. I hope it will make backtracking and exploration easier :)
• Added an overlay to the ball, which makes it visible even behind non-disappearing walls and obstacles.
• Added a persistent shadow underneath the ball to indicate exaclty where it will land.
• Visual updates: upped the quality of Light Shafts effects, environmental particle effects, polish