Thanks. I had recently noticed the mouse needing to be held down to trigger the jump. I was going to look into making it more responsive, especially since mouse/tapping is the only jump control in the mobile version.
I also was informed about the full screen issue by someone using Firefox on a desktop PC with a large screen, though it worked fine on my 15'' laptop. What kind of device are you using? Setting full screen to work properly seems to still be in progress with GDevelop and I am hoping to work some more of the bugs out.