Glitch in the Blocks Game and problem with Unity!

godsgamer

Following the Youtube series on 'How To Make A Video Game' by Brackeys, I was trying to make a similar blocks video game. Everything was going pretty well, but while I went to add text to the game and played it, the block first started falling through the ground. I modified the ground Rigidbody settings and then the player cube started to shoot up in the y direction. I closed Unity and shut down my computer when this happened last night. Today, I turned on my computer and now, Unity is no longer opening at all!

Please somebody help me to fix this problem.