Add explosion for rockets,fix 1 item for 1 time

1)Must fix generate level platform moving from start
2)Must add new obj as planet & Boss
3)Must edit Sounds
4)Must work on hide & resume activity resource
5) Must add new type of rockets icon
6)Must fix Enemy Class
7)will mod rockets without directional gravity more life,only
superockets has gravity
8)will add particle rear rockets
9)will add explosion on rockets---do it