This unfortunately falls outside of the way Drawabox is intended to be done - that is, you get feedback once the whole set is done, not for partial work. This is for the sake of efficiency - we're able to keep the price for feedback down as low as it is largely because of rules like this, putting the onus on the students to complete the work to the best of their ability.

That said, I will clarify one thing, as part of your confusion is the result of the lesson being in a bit of a scattered state. Currently the lesson has 3 somewhat distinct approaches for head construction, due to the fact that the course as a whole has been developed over many years, and so different sections get updated to reflect what I've learned from explaining the concepts over and over in my critiques. This is something I'm gradually working to fix, to bring everything into a greater level of cohesion and to address inconsistencies, but such work takes time, and I'm currently working on updating Lessons 0 and 1.

As explained at the top of the tiger head demo, the most recent, most up-to-date, and generally most effective explanation for head construction is found on the informal demos page. While all of the 3 approaches in the lesson stress the importance of treating head construction like a 3D puzzle, with all the pieces wedged up against one another to produce a firmly grounded, three dimensional, and solid result, this one hammers that message home the best.

So, when approaching all of your head constructions, try to apply the specific approach show in that informal head construction demo as closely as you can. It won't always fit perfectly, but generally you should be able to stick to the pentagonal eye socket shape, with the point facing downwards, so as to create a wedge between the sockets for the muzzle, and a flat surface for the forehead to sit upon. Also, don't forget to define that forehead as well.

If you have further questions in between submissions, you can make use of our discord chat server, where there are tons of other students at different stages of the course, as well as a bunch who've completed it.