Changes:

A game for your brain.
- There are 7 gates, each locked with a key from 0000 to 9999.
- You have 5 minutes and 50 tries to unlock the gates.
- Game modes: Tracker, Puzzle, Easy (press F1 for details).

1.3.1
- support for Windows 10.

1.3.0
- interface changes.
- easy mode available.

1.2.2
- some improvements.

1.2.0
- a new interface.
- puzzle mode available.