I loved the backstory and the idea behind the setting! The narrative and dialogue were neat and clean and even though I usually struggle with deckbuilder games I could see how a hand card limit could make the genre easier to get into for me. Adding some minigames that show how you help with the tasks could create an interesting and refreshing play style. Nice work! I hope you continue exploring this idea! :)
One small thing: At first I was a bit confused about what to do and how to control the player. I personally read the note first and thought I could only control the game with the mouse instead of the keyboard. Maybe it would make sense to place the controls above the note, so they are immediately visible.