> What part is missing? It appears to have all the core parts of a bicycle to me?

* I am not an expert in pelican anatomy, but it appears that the bicycle's saddle, if present, would be very deeply inside this pelican (try drawing it onto the frame, and see what you get). Let's be kind, and assume that the seat is simply missing.

* The crown on the fork[1] is missing. The fork is not separate from the frame; so you can't turn the front wheel.

* Neither of pelican's feet are on the pedals (the left foot appears to be missing altogether)

* The wheels are way too small for that frame.

Note: Brakes and gears are nowhere to be seen, but OK, let's just assume it's a fixie (or a single-speed with a coaster brake). Let's also assume the red thing on the basket is there for decoration.

Also, the spokes on a typical bicycle wheel follow a cross-lacing pattern [2], at an angle to the radial direction, and you can see them crossing each other. But OK, let's let that slide.

My point is: sure, this thing at least passes as a bicycle. But it's not a good bicycle drawing.

[1] https://en.wikipedia.org/wiki/Bicycle_fork

[2] https://spokecalc.io/how-to-lace-a-wheel.php