Post-Release Update 2

These are the changes in this update:

• The black arrows, indicating movement, look a bit different. 
• The handles, indicating that an object can be grabbed, look different (and should now  be easier to recognize). 
• Changes to the script guiding carried objects. Prop flying should be way more difficult, now.
• Size of black arrows change size, when pointing at an object and pressing show-connection-button. Should make it easier to acknowledge their existence. 
• Changed the default binding of show-connection-button from h to f. I hope this button being physically closer to the other buttons will incentivize players to spam that button more.
• Some changes to levels 21, 24, 26, 28, 29, 36 to avoid unintended solutions. 
• Some changes to levels 18, 23, 28, 43, 55 to improve playability.