Okay so I recreated a similar situation, the object "Enemy" angle is adjusted to 90° as soon as player points reach or exceed 30, then bullet behavior is activated with speed=200 and travelled distance will be checked if it reachs 100 px or more :
The blue bar height = 100 and the red marker follows the enemy Y position, that way you can visualise the trajectory progress : i.ibb.co/wptVt5S/GIF.gif
However it can sometime be innacurate by a few pixels, that's why I added the last action to adjust Enemy Y at the very end, so it is repositioned immediatly at the good spot;
Hope that helped you ~