I love chair builds, and you've created a very attractive one.   The lack of a stretcher at the low end of the front legs is beautiful simplification.  It does look like a justified simplification given that upper stretcher, hinges, and pivots at the seat probably provide sufficient rigidity.

Also, I'd expect that the slanted seat to be more comfortable than the average folding chair where the seat is level.

A really nice job, more so for a first chair.