Nicely polished. Interesting idea. Inspired by portal 2 I think?
To start with I thought it's not so thematic; jumping into lava is just the same as jumping into a "win square". It's much more interesting having to run into walls so fast you die - because it's much harder to mentally abstract away from "I'm killing myself".
But still... kill self = win means killing yourself is not failing... if you see what I mean.
But I had a good time with this one :)