Hey thanks so much for giving the game a try and providing feedback! Here's my thoughts, feel free to respond or not!
#1, a few people have suggested this and honestly it's a technical issue. I plan on adding lots more mechanics so the initial levels might be a bit too simple. I do plan on having little quick time events appear once you stop doing something for a few seconds to help fill the time. Like a little spirit would appear and if you tap it fast enough you get some currency to use to buy cosmetic upgrades.
#2, This is a great idea that I hadn't thought about. I am not sure about it though since in the later game it's much less about the overall time and more about other ways to earn points. I'll have to play around with it and see but I'm writing this down.
#3, there is an option to do that in the menu! I tried to have a few things point to it but maybe it wasn't obvious enough?
If you're on android, supposedly there is a way to play it on PC but I haven't tested it yet. I do plan on releasing a paid version without ads once it's more complete though! Great to hear you think it's good enough for that.