Fixing the Game Over Feature

[yehiarasheed]

Describe the bug
Whenever we press the "Play Again" button in the Game Over prompt and go to play the same gameplay mode we were playing at, the mode does not reset correctly, the lost lanes are still lost and dark and the titans are still added in the lanes.

To Reproduce
Steps to reproduce the behavior:

1. Start the game and press the "Start Game" Button.
2. Click on the chosen gameplay mode (Easy or Hard).
3. Play out the whole game till all lanes are lost and you are presented with the Game Over Prompt.
4. Press "Play Again" button in the Game Over prompt then redo steps 1-2 choosing The same gameplay mode.
5. See the error at this stage.

Expected behavior
After choosing to Play Again, even if the users choose to play the same gameplay mode over and over, it should reset and be playable each time. However that's not the case because of this bug which is why it needs to be fixed.