Among Man v0.3.0

Hello. This is v0.3.0 of Among Man. In this update, I added a Game Over screen and I redesigned the course to make sure every opening has a width of 2 meters. And I added a lives counter.

Changelog:

• Added a Game Over screen.
• Added a Lives counter.
• Game waits for the first movement.
• Make sure every opening is 2 meters wide.
• Improve the AI by adding invisible cubes called checkpoints.
• Make sure the course has no dead ends.