Counting score

[Seblis]

A temporary score-counting system can look like this:

• corrupted tile: 10 points
• blessed tile: -5 points
• defeated enemy: 8 points (can vary between different enemy types)

The game engine (singleton in the "global" folder) can track score eg. via signals.

[Bad-Grandpa]

Also i would add a signal to reset the score. That signal could be used when:

• a new level started
• player died

[Seblis]

In #15 we had to rework CorruptionEngine, which also made it better suited for counting score