That was a very fun game. Love the graphics, and the concept is very unique too. The controls also very feel nice once I got used to the gameplay, it's quite hectic but also very fun when you start managing tons of ghosts.
A quality of life change I'd make is to have the shop reroll automatically when it's free and when you don't have ghosts to buy. Oftentimes I'd forget to reroll the shop because I'm too busy micromanaging all the ghosts. I also think the third level is way too difficult when the +7 boxes show up. If you make one mistake, your run is basically over since the boxes are so large and they kill most of your ghosts. Finally, this game does need some sort of tutorial, but I understand that it's difficult to make one with only a week to develop the rest of the game.
Overall, very fun game, and very cute art style. I played it for quite a while.