Jumping Issue/Bug

Astralmancer

Im making a platform game, and Ive made the character jump.
First problem: As long as you keep pressing up, the character will never stop jumping. (Ive tried to make the 'gravity' higher but it doesn't work.
Second Problem: I would like the character to move right while jumping to go on platforms and such, but the character can 'fly' in the scene. Ive checked the velocity and it turns to 0 while the character is floating, but the character still moves down slowly while flying.
Is there any way I could change that to a jumping thing similar to Mario or other platform games? Thank you this has been bothering me for a long time.

jamie_c

Maybe this tutorial will help: