Thank you so much for the honest feedback! And yes, some mechanics are not explained very well because I was so out of time that I was only able to make the intro in the last day of the Jam, so the written tutorials are kinda nonsense or missing in some parts, which makes the game more cryptic than it should. Also, some puzzles indeed have different possible ways to be beaten, but some do not, for instance in your example you nedded the extra life power up to be able to cross the corridor without death being a problem, but it seems that it can be brute forced, which was not the intention, and perhaps even the extralife method is not very obvious, so I will probably change it.
And thank you! I do plan on polishing it more with all the feedback I receive, the design of some parts are kinda rough since I was only able to have a game tester in the last possible day of development, so all feedback is very special and much appreciated!