Thanks for the feedback! I originally had ideas to expand the game with more upgrades and bullet types. These would require you to plan your shots a little more. Sadly, I ran out of time for that.
There is one mechanic which a lot of people have missed which kind of achieves this: if you destroy multiple ghosts with a single beam then the points you get are multiplied. I would've liked this to be more prominent, to encourage players to try to aim more carefully and clear several ghosts with each shot, rather than just spray and pray like you said.
Thanks again, and glad you enjoyed it nonetheless! 😁