More stuff added

A lot was done in this update, we added a new enemy type and some fun physics on the platform

• Changed Bullet Trails And Bullet Explosion Particles
• Added a rotating platform somewhere :)
• Added a crusher that kills you
• Made a tutorial popup
• fixed a bug where you can jump on the side of platforms
• added a title menu 

If you have any suggestions email galaxytrooperbot@gmail.com