I love the welding mechanics, it's truly unique! I think the joining aspect of the welder and the character is not big enough as the theme of the game, but I think the welding is pretty fun, opening up many different possibilities to solve the puzzle. I think the circle is falling pretty fast though, so it's hard to actually "catch" it, I have to hover near the place I want to weld, hoping that something would stick there. It's also a dangerous hazard too, with it's round size that roll everywhere and kills me the moment it touches me, falling or not. I think this idea is neat, and would love to see it expands more.