i like the shop system, it's nice. i like the upgrades, they're quite fun and intuitive. everything i said previously remains mostly relevant, though i'll also add the gameplay is a lot more fun with the upgrades.
i'll update the dying thing and say that i think it's too hard to die. i don't personally feel any real threat from the blue guys because i can either outrun them or just tank hits from them. i think this could be solved with making them shoot stuff maybe?
i also ran out of people to shoot, i think it would've been a good idea to make more silly guys spawn in.
i found something new that i didn't point out yesterday but i think that the sound effects for hitting an object such as a building and hitting a silly guy should be separate maybe? on this i also think it may be good to make the bullets not load offscreen, it's less satisfying when i shoot one of them offscreen versus onscreen imo.
the progression is good, i think the piercing upgrade is a little useless but the other ones i like. i think you should get more money from shooting the silly guys, it's kinda hard to get anything from the shop.
the ui for the shop is nice. i do think the shop cards could maybe have been made a little more papery, i dunno. that's more a personal stylistic preference.