1. Fix the bug that the auxiliary content opened by "H" key is incorrect;
2. Repair the possible movement BUG of the rotator;
3. Fixed the BUG of placing blocks in the air by pressing the "Ctrl" key;
4. Fixed a BUG where the thumbnail was the previous map;
5. Fixed a BUG of the item display or previous map;
6. Added some new alloy blocks and engines;
7. Other performance optimizations;