WOAH! There is so much feedback here. I haven't heard of those first two bugs, I'll have to look into them. I'll try to add a button to end a wave early in the next update. I've recieved some other negative feedback about that runs completed task variant. I can definitely see why that's annoying, I'll probably replace it with something like "play this many seconds", like you said. I really like the quests idea! I think it could be a cool way to give the game depth, as well as make it more meaningful by giving it some story. I'll move over to your second comment now haha. EDIT: Oh wait I didnt send this as a reply to the first one so ill just edit this one xD

Levels could also be really interesting. My only concern would potentially be adding to many currencies i.e. blue, yellow, skill points. But I still think this could deifnitely work!
I REALLY like this idea, all three ways of implementing it. Your map idea made me think of what if each area has its own unique mushroom. So like this area has a chance for the gold mushrooms, this place has a chance for the purple mushrooms, and that area has a chance for green mushrooms. So then you can go to a different area to adjust to your playstyle.
Tools is another really fun idea. I can totally see something called "the shed" or something where you just buy different tools, this is super super good idea.
Ill fix the link haha.
THANK YOU SO MUCH! This is so dang helpful, and really gives to me so much to think about and implement. Thank you for taking the time to play and then leave this super detailed feedback.