As another dev with an ambiguous blob character, I really like your character design. Hoodie and nose are a nice touch.
Gameplay seemed to work climbing and jumping gaps, and pressing F to let go worked for me. I collected the little game piece behind the walls, and then spammed buttons until it disappeared from my inventory. I couldn't interact with the numberpad thing, and on my second visit to it I got stuck on the black square thing. Pic related. Could still move the camera but nothing else worked.