I've played the 2018 one. I've seen some games about ordering pizzas on the Pizza Jam a while ago and many of them had mechanics of remembering where you should give pizza instead of deliverying it to everyone. Maybe you could use something like that. Challenges for skins sound good.
I was kind of inspired by (cough) (cough) fortnite
to make the skin challenges, look forward to the update around september 20th, I haven't decided a good release date, I don't know how long this will take, (I suck at releases)
the 1.1 has a boss, and a shooting mechanic. For info on the controls, visit the game page
(My life rn) 