I am trying to learn GDevelop and building a platform game it’s going pretty well well at least for my first effort.
But when I hold in space bar the character repeatedly jumps is there any way to make it so the you have to press the space for every jump and can not hold the space in for what kind of reminds me of the old auto fire on gamepads.
Welcome to the forum!!
One thing you can do is use the “trigger once while true” condition with the space key pressed event, then that will solve your issue 
Many answers like these may have been answered many times before and so you can probably find known solutions in existing topics in this forum 