Hey thanks for the well thought out feedbacks! I appreciate the amount of effort being put to make this feedback; from my experience this kind of feedback takes at least 15 minutes (after typing the whole message I realized your feedback probably took at least 20 minutes) to type.
Thank you very much for giving high rating in most categories. I have said this in other comments too but at first I actually doubted the concept; but I guess I was surprised when I actually tried to execute it.
The criticism about the timer is definitely something new. The reason why I added the timer is because well... try to imagine for a second if this game had no timer... you play it once and it is done. I thought that during the game development so I added the timer for extra challenge; emphasis on being extra. Clearly since you felt like you had to go fast first try I failed to convey that intent though; so this is definitely a room for improvement. One thing I may consider doing next time is giving an option for time attack mode, hiding the timer first time (or until you do the level properly), hiding the timer the moment you get a fake coin, or showing the timer only at the end of the level if no fake coins were collected.
Regarding the time attack/speedrun mode becoming a memorization challenge.... Haha yeah I just realized that. I suppose because I am the dev I cannot properly understand the experience of players who first come to play the game since I already know the placement of each coin since the first time I placed it. One thing for sure this feedback was rather new and surprising since my testers in my jam's discord server all loved the timer. One thing I notice about speedrunning though it does often become a memorization challenge separate from the more immersive intended experience. I mean try the genre of metroidvania; the genre is supposed to be about exploration -- but obviously after it is completed that thrill is gone forever and so people speedrun it with of course some form of memorization of the map. Though I suppose I also need to recognize that usually metroidvania speedrun are players creating their own challenges.
The glitchy coin idea definitely seem interesting... but I think for easier sprites maybe instead in addition to the fake coins spinning in opposite direction, they are also less shiny -- assuming I will one day update it.
In any case thank you so much for playing and giving all those helpful feedbacks.