Make achievements please and long term goals as well. Doesn't have to be work intensive. You are a small dev team. Just add some stupid shiny colors and maybe a shirt and 2 hats to start off with for each map. Equippable kill animations might be a good future goal as well. Also better end screens for impostors and crewmates. Just long term goals to think about where you want to be a year from now.
Edit: Thanks for the great game too. My friends and I love it to death.