Hey, I saw you do not have many posts on here, so I wanted to put a review up with some notes.  I would say this game shines in about 90% of the levels.  It's fun to go back and rethink levels to beat the gold time, and when you find a creative solution it becomes very satisfying.  One note on that though, there is a bug I noticed (unless it's supposed to be a feature) that if you dash through the lava walls / floors, you can just go right through.  I did that accidentally one time, and I shaved a solid 15-20 seconds off the gold time.  I was playing the Android version if that makes a difference.  If you want specific levels, I can give you a handful I saw this happen on (but I assume it is everywhere with the lava because it kept happening if I tried on different levels).

I also think that your end level sequence is in the wrong order.  The "last" level (10-6) is a pain to get gold on (although I really like the overall design).  The level is designed to be about 5 seconds too long (unless I'm missing a major shortcut), and 60 seconds of near perfection is a lot to ask.  It would get frustrating to repeatedly come up 1-2 seconds short.  I probably spent 10-15 hours on that level, and when I realized I unlocked a bonus set I did not feel any excitement.  This level almost demands to be last (11-6) because it is so challenging.  I'm sure you want level 60 be where it is because it thanks the player, but you could also have a note that pops up when the player completes all the levels that says, "Get gold on all levels to unlock the final set!"  Beating that level was the high point for me, and the additional levels (while fun) offered little more to expand upon because they were much easier than getting the gold on level 10-6.

I don't want this to sound too negative though.  I did really enjoy the game overall, and I have started playing 8 Links which I have been enjoying as well.  Thanks for taking the time to make a really fun game and making a mobile version.  I had a lot of fun!  I bought this in the Bundle for Ukraine.  I never would have found this game otherwise, so I'm glad you put it in there!  I hope more people find your fun game and play!