Left Click + A + Space while in game exits to main menu instead of performing a jump, possibly because Space clicks the selected button (which is the button to exit to main menu in the top left). Either the jump button needs to be changed to W or the default behavior should be removed from pressing the spacebar.
Wow, thanks for the info; just tried it, strange that the problem doesn't occur in full screen... hmm exit to the menu is also assigned to the escape button in my game, is it possible that the Left Click + A + Space combination works as an escape button in Itch.io? (in the game editor problem doesn't occur) Strange that it only works with A and not any other letter
Firstly, the keys only need to be pressed in order, not all at once. Left Click focuses the game's window, then using the WASD or arrow keys selects various UI buttons as well as moves the player (in this specific case, pressing A or the left arrow key selects the exit to main menu button). Finally, pressing the spacebar clicks the button, which in the same case causes the game to exit to main menu.