That's a fantastic idea, thank you so much for suggesting it!
Randomisation tools like a dice roller or a decision wheel would fit perfectly into the "anything and everything" concept of this game. I can already imagine adding them to the "Utility" section of the minigames, where every roll or flip gives you a tiny bit of EXP.
You've also given me a more advanced idea related to the To-Do list, which I'm currently planning to enhance. My next major update for the To-Do list will be an "Achievement Log" feature. On top of that, your idea for random rewards is brilliant. I'm now considering adding a "Random Table configuration" feature, where you could set up your own loot tables for quests. Completing a task could then trigger a prize wheel based on your custom table to determine the EXP or item drop. That could be really fun.
I'll definitely add these ideas to my list for future updates. I really appreciate you sharing your thoughts!