Build 25972420

Version 0.5.7 is now available on Windows and Linux.

- Mika points out the optional 90-second test season when it becomes available.
- A new 90 icon in the career HUD opens the seasonal shift directly.
- Leaderboard names are easier to enter on Android and start with a neutral,
random six-character suggestion.

The seasonal shift and leaderboard are optional, time-limited and currently in
testing. They may be changed, paused or discontinued for operational, security,
technical, economic or legal reasons. The paid local career game and its saves
remain available. Mandatory consumer rights are unaffected.