Its... confusing.

I really like your twist on the theme. Having only one dimension of play might seem like it would be impossible to make a game with but you managed to make one anyway. I do have to agree with the other commenter that it isn't really truly 1D, but since it was made for pew pew I guess you had no other choice 🙃. I appreciate the way you integrated the drop with attacking the enemy on the first level which made me feel like I was a timing legend.  Although I did find the game to be pretty interesting, the responsiveness of the game really made the experience worse. It seemed like there was at least 200ms of delay from when you pressed the button and when the action was performed, this lead to a lot of split second attacks from me failing. On the topic of attacks, although there seemed to be a pattern with the attacks of the enemies, often times I would think they were done attacking only to instantly die when I moved to attack them. I think your attacks need to have a shorter, more defined transition time between attacking and not attacking (Assuming that the flickering attacks are the transition period). These things caused me to take a bit to complete the game, but when I finished it was cool to see that there was an end scene. Although I was not exactly sure what was happening it's nice to see it's not just a black screen with nothing. Overall, cool take on the theme but the lag made it a bit frustrating to play.