This is really fun! Kudos! I like the art style and the upgrade system (though Launch Speed seems to be the weakest option - I fared better focusing on the others). I would also have loved if the end screen showed how many nights you survived.
One bug I stumbled onto: when you respawn, the XP from the previous game sticks around - I started my second run and got a bunch of XP instantly, bringing me to level 16 after the first night :D
I think my best run was to Night 22 or something like that :)