That last level 😰it felt great to finish it though ^^
The game is really not kind with the player's collision box, add to the the precision needed in some levels it can be quite hard. I liked the Portal context. Apart from the spring sometimes not triggering or not behaving correctly if you had downard speed, i liked the different mechanics.
I think you could have used more the theme. Maybe not having that many different more classical traps but more puzzle focused on managing your crouch state. Right now each time you need to crouch you can do so in that very same place, this kinda makes the feature more aesthetic than actually useful gameplay-wise, although it does have impat on the collision box and the spring force, it still feels like it wouldn't change much the game if that crouch thing wasn't here.
The menu is fun :P The lasers synchronised with the music is nice, even if unintentional. Overall it was a hard but cool experience.