I tried to buy a helmet but i think i clicked on the X before I got the helmet.
I had 250 coins.. and then the game crashed.. AND I had the last key to unlock the last door of the bunker.. I sad.
This was really fun! It was really creative to use the time as money and health. My one complaint is that it is a bit easy, I wish the enemies took away a bit more time. Also it seems as if the shops stop appearing after round four or so? I think it has a lot of potential for more upgrades and enemies. I really like when there's tons of bullets on screen(like the screenshot) and I get to analyze how I'll dodge. 
Alright nice, what a cute little game Ian has made for us this time! Y'know, i wonder what the connections were for this one? I should take a look at-- Oh. Huh that's. That's ARG type stuff right there.
I have now decided to take it upon myself to make a lore analysis video essay about Project 2021. (Ian I dont know how to contact you but I'd love to get an interview or something please)