When you get to the asteroid belt, here is the "hit-box" for the spacecraft. This is where you will be able to interact with weapon crystals and pick up items until I'm able to update the game!
Also, if you attack enemies from the side, usually one square up is where it will register. Attacking from above or below should always work, aside from the occasional glitch. Lastly, if you find the shield, you have to be facing the enemy for the shield to work.
Thanks for playing my game!