Wow, what an interesting idea you guys have! I had only tested the version available here on the site, but from the little I played I could already see that the controls are precise and very responsive, which is essential in a platform game, and the fact that it is controlled by a button makes it very simple and easy to understand. I found the stages very interesting, I really liked the level design, however, I found them a bit repetitive and without any risk, but from what I saw in your devlog, this is something you have already solved. The music and sound effects are good, they complement the game well, and the idea of the game being centered on finishing the game in the shortest time possible is brilliant and gives the game the depth it needed.
I don't need to say much about recommendations, you already seem to have a good vision of the project and what it should be, hmn... maybe add a little more artistic touch to the environment, like, the platforms are the dish to be served, it's a delicious dish, but it would be better with a little seasoning, like some rocks here, a wall there, the decoration, you know. This may seem like something "trivial" but it makes a difference in the final product, it gives a little life to the environment.
and...
that's it, like I said, you already have a good vision of the game, just keep creating new mechanics, levels and music, add a little artistic seasoning to the composition of the levels and you'll have a great game on your hands!
oh, and I don't know if you have this in your plans, but I think the style of the controls would fit perfectly on Androids and would reach a larger audience of players.