firstly thanks for the praise haha! glad to see everyone being so friendly with their feedback and responses! also i fully get the 3 level thing, with such short time I'm surprised about how much polish all the games (including yours easily top 5 most polished in the jam) have!
Regarding the platforms, I understand your point. Personally, I think simplifying it to one button for the platforms or adjusting the speed of the platforms could make the gameplay experience smoother and more enjoyable. Another possibility could be tweaking the jump mechanics to make it feel slightly more floaty, providing players with better control. Of course, these are just ideas off the top of my head, so please take them with a grain of salt lolll.
Ah, the exploits! It's always amusing to discover those intended "unintended" tricks in games. The placement of coins now makes more sense to me, considering their connection to the exploits. If you plan on creating more levels, I would suggest being mindful of that and other exploits and either implementing a cooldown mechanic or designing levels that take them into account.
Once again, fantastic job on your game! I'm genuinely excited to see what you'll come up with next. Keep up the great work, and best of luck with this and future projects!