Thanks for the feedback! Yeah I wanted to improve the cannon firing a bit more including changing how it fires + adding a trajectory prediction but I unfortunately ran out of time.
Yeah I probably should have differentiated the sound effects a bit instead of making them both a tape stop. Also definitely overdid it with the negative upgrades, if I continue the game definitely will balance it with a bunch of more positive ones. The auto shooters / sellers are a great idea and I could probably also do some other similar things like auto bakers, a water tank that auto puts out fires that you click on to refill, etc.