Thank you very much !
To be honest, I couldn't find a way to shoot while running so I opted for a state machine in order to correctly display the character's animations. That is why when you shoot, the character stops and it slows down the movement - something I don't like too much in my game by the way. I need to figure out how to deal with this.
I also found during my tests that the conditions for victory weren't right, but I didn't have the time to correct them.
The controls for the QWERTY keyboard have been forgotten but that's something I'll take into account in my next games!
PS: I fixed the Linux build ;)