I want to apologize to Roksim for all the slight botherings recently.
I just found the problem and it was on my end.
All the years I had this laptop and I had no idea this was a thing.
Apparently there is a thing for touchpads called a "touchguard" which stops the use of the mouse when using the keyboard!!! xD
So the reason I can't interact with the NPC was because my touchpad won't allow me to jump and click at the same time. (I found a solution which is to turn up the touchpad sensitivity in setting.)
So in a way your game helped my find a problem I didn't know I had so thanks.
This should be the last comment on this and again sorry for the interruptions.
PS: Finally interacted with NPC turns out it's a Stompo toy, Looking forward to your next game. :3