Played the first few levels and i think it was a great effort. It wasnt a typical puzzle, platformer but had some unique elements to it and the theme integration was quite strong.
I got stuck at the speed level like most others and i read your post on discord for the explanation - i think your idea to make this level was solid, just that some tweaking of some variables would be needed for you to achieve your desired outcome. And one of the purposes of a jam is exactly that - to get feedback from players! So now that you have that, im sure youll have much better clarity on what to do.
Other than this, i liked the gameplay and the short levels, each with a unique twist which is definitely one of the characteristics of this genre. The art was also simple and charming, but could use some polish for sure. Some particle effects would also add to the polish. For the inverted controls, one suggestion is to visually communicate to the player that the controls have been inverted through some indicator or change in color etc or even a change in music.
Good to see that in your first jam you could submit a completed game, complete with story and many levels, so congratulations and well done :)