v 0.1.2 changelog

------- Changelog version 0.1.2 ------- 

Changes:

⦁ Enemies now have more healthpoints. We made it to denomstrate how new knockback system works.

Added:

⦁ Enemies now react to damage: 1) Added knockback 2) Added sprite flashing 3) Added hit sound

⦁ Enemies now have visual effect when dying.