Yeah some of these issues I already noticed with other comments. I'm definitely saving your comment for when I redo the levels.
My friend playtesters were too non-critic :P
I also have some doubts about, if I want to expand the game, if i should go more puzzle-like and slow-paced, like the first half, or action-focused like the second half with the enemies and the boss, or if I can strike a healthy balance between the two.
You're a great playtester and level designer (you definitely caught most of the issues some comments in alakajam pointed out). I'll make sure to bother you after I make a new version.
Thanks a million!