Cover1—Manhole

W / ↑ – Move bridge to upper-left
S / ↓– Move bridge to lower-left
O/  ← – Move bridge to upper-right 
K / → – Move bridge to  lower-right

Video Link: https://drive.google.com/file/d/1TMni6raRpGjxF_vgK-JnFHdSmsD2QL27/view?usp=drive...

Screenshots：