At first, I could only go back to the selection page after passing the level to see if there was a triangle to determine if I had completed the level with the minimum steps. After a period of time, if I play the previous level again, I will never know whether I have completed the level with the minimum step, because the triangle always exists, and I have no way to judge whether I have completed the level with the minimum step....

After completing the final regular level and watching the end-credits, the game put me in the following screen: https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3452991546 The triangular stars in the background were moving, but the planet and moon were not; no key or mousepress did anything. I eventually just alt-F4'd out of the game and after restarting everything seems normal, but this did feel a little kafkaesque....

if you do, the game wipes all of your progress anyways. (you'll also lose ALL of your achievements.)

I completed one of the levels with two fewer taps than the triangle requirement, can I get a cookie?

beaten 8-4 with entering pipe only once but it's not the hiden challenge