Thank you the feedback!
I struggled with getting the physics working (spent the first 3 days prioritizing on that in fact) so I had to overlook some problems. I see that there are a few notable bugs and inconsistencies with the arms.
About the pixel art, I'm getting a few good suggestions like yours, and will surely implement them after the jam is over.
I'm not sure if I can update the game before the jam finishes, if I'm right doing that may lead to disqualification?