It took me i while to even see the nails in the first level and understand how to interact with them. Also being able to press down to pass to the lower plataform could help the feel - or change the sprite, that visual screams the kind of plataform that you can drop. Also the text area is way too big.
That being said, is very polished and its amazing that you managed to fit an boss fight there. Very fun game. I loved it!
Ty for the feedback and glad you enjoyed! :D
I might add some more stuff to the game after the Jam, including more instructional dialogue, we also ended up having to rush the background a little bit because everything we tried made it hard to see everything very clearly. I completely agree on the dialogue btw, but at the time I decided against wasting more time fixing it, and if I had to fix it in the end I wouldn't have time to edit all the text inside of them :P