Update to version 0.5.2 — Knightczech: The beginning Steam update #1469103

Expansion of Classic mode section Since the story mode update is out, I started working on classic mode again. List of changes below: - small bug fixes and polishing were done (in both modes) - small balancing updates on level 8 and level 9 in Greenland forest location - levels 5 - 8 in Fields of Ashes location were updated, it should be harder to complete them now New Challenger levels: - new classic mode menu section was added, you can access the "Ultimate/ Challenger levels" now - there is currently one new Challenger level available, alongside with a new achievement for finishing it Controls changes: - "Attack" was finally moved back to left mouse button, the issue was resolved - I am currently planning to add options to change the user controls input, it will be probably part of one of the future bigger updates