Sci-Fi Platformer_Prop Pack was added.

Several props have been completed. 

We will distribute them collectively.

1. save point
   
2. recovery unit
3. lever switch
4. button switch
5. item box
6. room door
7. explosion barrel + Can
8. death thorns
9. drill base + charge drill
10. circular saw
11. wall turret + bullet
12. collision block
13. floating scaffold
14. mini console
15. wall display
16. big gate
17. elevator