How you chose to fitted the theme is pretty funny.
First there isn't point to the game right now so I would recommend adding some score/timer that you need to achieve or just make it infinite to see how far can you go with some number (human are built to like big number).
Second the core mechanic of the game is pretty good except maybe there isn't enough variety on the game like more enemy or upgrades. I also don't like how you need to click fast to shoot fast ( like if you have glorious model o with double click vs viper mini pro that cannot do any high cps clicks.)
Third the game isnt very polish like health UI is quite hard to see, there no effects at all like dying paper particle, no restart button, no sound effects and music and no main menu.
Fourth a bug possibly : sometime paper spawn on top of you which is crazy since there literally no way to dodge it. Or you could say there a spawn point which you should avoid but I think that just bad design.
Fifth Look like you're new to game jam so congrats on your 2nd game jam!!