The mechanic of having shoot make you go back is a really good idea! It forced me to be constantly pushing up towards the enemy! The main feedback I have is just making some things clearer to the player like making the bullets easier to see and maybe having a prompt to tap space when the plane starts smoking but tbh all of that is just polish. I can really see this game having a lot of potential and I would suggest experimenting with other enemies that take advantage of the player always needing to be on the far right of the screen. Excellent jam game! (Also huge props for doing all the art and audio during the jam, we did the same and we know how much extra work it is)