I actually liked the 2nd one to some degree once I got the hang of it, made for some good twitch content
The first one was cruel and unusual
I literally just ran those goombas over springs to see what would happen and found it so funny I that I ran with it. But I also realized I couldn't publish without clearing so I threw in those mushrooms to make it possible to get through without it being a total crapshoot. Basically the thing is you gotta run through as quick as you can, hopefully grabbing a second mushroom if you take damage, and exploit the damaged invincibility to run through the end part then the last half isn't so hard.
With the second level it's kind of amusing to me that it has such a catastrophically low clear rate since I can clear it in 4 to 5 tries but I'm aware that it's because I know it better than anyone. And in fairness, I know that the first half is super rough without there being a checkpoint but the problem is I couldn't do a checkpoint until after I was done with all the ON/OFF blocks because for some reason the checkpoint would reset the order on those in the second room. So I literally could not clear the map to pass clear check until I deleted the checkpoint and moved it later into the level.
I tried to make it challenging but not gruelingly unforgiving. Like it's a level that punishes mistakes but also one where you only need to have perfect precision in one part (the falling through the spikes part). I occasionally jump into the "new" playlist and will try random levels that are so brutally demanding. Like you need every second of your run to be perfectly precise or you have to start over, and I don't have patience for those. I just give up and don't give it a like. I tried to model the level after the ones that are hard but don't require you to be a Mario savant to clear.