1. No smooth character rotation when moving, its not smooth
2. The jumping system is built by a kid, it changes position instead of:
When this is tapped
Tell actors with tag #character to perform
Modify dynamic motion property velocity Y to -2.
I will tell more also for smooth rotation u need
Character > Logic
When thi is created
Repeat every 0.0167 seconds
Modify a property rotation
Smooth
My own: dynamic motion: velocity x
With smoothing 0.1